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Luís Lima Ferrás earned his second Ph.D. in Mathematics from the University of Chester (UK) on January 15, 2019. Prior to this, he obtained his first Ph.D. in Polymer Engineering from the University of Minho (Portugal) in 2012. He holds a Master's degree in Applied Mathematics from the Faculty of Sciences at the University of Porto (2007) and a "Licenciatura" (5-year degree) in Mathematics from the University of Aveiro (2005). Currently, he serves as an Assistant Professor at the Faculty of Engineering of the University of Porto (FEUP), specializing in Mechanical Engineering. Previously, he worked as a Junior Researcher at the Center of Mathematics of the University of Minho. His academic contributions include 54 articles in International Peer-Reviewed journals, 18 conference proceedings, 16 posters, and 61 oral presentations (15 of which were invited). He has authored 8 book chapters, with one book currently in development, and edited 2 books. Additionally, he has organized 9 international events. In terms of supervision, he has co-supervised 1 Ph.D. thesis in Mathematics and is currently co-supervising another in Applied Mathematics. He has supervised 5 MSc dissertations in Mechanical Engineering, Polymer Engineering, and Mathematics, as well as 1 course completion work for LSc/BSc students. His achievements include 9 awards and/or honors. He has participated in various capacities in 6 research projects, ranging from PhD Student Fellow to Principal Investigator. His research interests lie in Exact Sciences, particularly Mathematics and Applied Mathematics, as well as Engineering and Technology, focusing on Mechanical Engineering with an emphasis on Applied Mechanics. Throughout his professional journey, he has collaborated with 111 peers on scientific papers. His curriculum in Ciência Vitae highlights his expertise in areas such as Numerical Solution of Differential Equations, Mathematical Modeling, Analytical Solution, Partial Differential Equations, Finite Differences, Finite Volume, Collocation Methods, Rational Mechanics, Transport Phenomena, Diffusion, Computational Mechanics, Computational Fluid Dynamics, Rheology, Complex Fluids, and Viscoelasticity.
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Identification

Personal identification

Full name
Luís Jorge Lima Ferrás

Citation names

  • L.L. Ferrás

Author identifiers

Ciência ID
731C-35E3-3B5E
ORCID iD
0000-0001-5477-3226
Google Scholar ID
r3TVndQAAAAJ&hl
Researcher Id
J-4321-2013
Scopus Author Id
55044835100

Telephones

Telephone
  • (+351) 253517425 (Professional)

Addresses

  • Center of Mathematics and Department of Mathematics, University of Minho, Campus de Azurém, 4800 - 058, Guimarães, Guimarães, Portugal (Professional)

Websites

Knowledge fields

  • Exact Sciences - Mathematics - Applied Mathematics
  • Engineering and Technology - Mechanical Engineering - Applied Mechanics
  • Engineering and Technology - Chemical Engineering

Languages

Language Speaking Reading Writing Listening Peer-review
Portuguese (Mother tongue)
English Intermediate (B1) Advanced (C1) Intermediate (B1) Advanced (C1)
French Beginner (A1) Elementary (A2) Beginner (A1) Elementary (A2)
Education
Degree Classification
2019/01/15
Concluded
 Ph.D. in Mathematics (Doctor of Philosophy)
University of Chester, United Kingdom
"Numerical Solution of Fractional Differential Equations and their Application to Physics and Engineering (https://www.dropbox.com/s/fux26opnbh6ugle/thesis_Chester_v1.pdf?dl=0)" (THESIS/DISSERTATION)
 Aprovado
2012
Concluded
 Doutoramento em Ciência e Engenharia de Polímeros e Compósitos (Doutoramento)
Universidade do Minho Escola de Engenharia, Portugal
"Theoretical and numerical studies of slip flows" (THESIS/DISSERTATION)
 Aprovado
2007
Concluded
 Mestrado em Matemática Aplicada (Mestrado)
Universidade do Porto Faculdade de Ciências, Portugal
"Condições Fronteira nas Interfaces - Descontinuidades no campo de velocidades" (THESIS/DISSERTATION)
 Very Good
2005
Concluded
 Licenciatura em Matemática (Licenciatura)
Universidade de Aveiro, Portugal
"n/a" (THESIS/DISSERTATION)
 15 out of 20
Affiliation

Science

Category
Host institution 		Employer
2019/01/02 - 2022/02/28 Contracted Researcher (Research) Universidade do Minho Centro de Matemática, Portugal
2017/08/01 - 2019/06/30 Postdoc (Research) Universidade do Minho Centro de Matemática, Portugal
2016/09/01 - 2017/03/20 Postdoc (Research) Massachusetts Institute of Technology, United States
2015 - 2017 Postdoc (Research) Instituto de Nanoestruturas Nanomodelação e Nanofabricação, Portugal
2013/02/01 - 2016/08/31 Postdoc (Research) Universidade do Minho Departamento de Engenharia de Polímeros, Portugal
2015/05 - 2015/05 Visiting Researcher (Research) University of Chester Faculty of Science and Engineering, United Kingdom
University of Chester Faculty of Science and Engineering, United Kingdom
2014/11 - 2014/11 Visiting Researcher (Research) Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
2009/09/26 - 2009/12/31 Researcher (Research) Universidade de São Paulo, Brazil
Universidade de São Paulo Câmpus de São Carlos, Brazil
2006/06/01 - 2008/06/01 Researcher (Research) Universidade do Minho Departamento de Engenharia de Polímeros, Portugal

Teaching in Higher Education

Category
Host institution 		Employer
2022/03/01 - Current Assistant Professor (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Universidade do Porto Faculdade de Engenharia, Portugal

Others

Category
Host institution 		Employer
2008 - 2012 Ph.D. Student Universidade do Minho - Campus de Azurém, Portugal
Projects

Grant

Designation Funders
2015 - 2019 Fractional Viscoelastic Flows
SFRH/BPD/100353/2014
Post-doc Fellow
Fundação para a Ciência e a Tecnologia
Concluded
2008 - 2012 Theoretical and Numerical Studies of Slip Flows
Ph.D. SFRH / BD / 37586 / 2007
PhD Student Fellow
Fundação para a Ciência e a Tecnologia

Contract

Designation Funders
2018/09/03 - Current MOLDPRO - Aproximações multi-escala para moldação por injeção de materiais plásticos
PTDC/EMS-ENE/3362/2014 - POCI-01-0145-FEDER-016665
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2023/03/01 - 2026/02/28 Mathematical Modelling of Multi-scale Control Systems: applications to human diseases
2022.03091.PTDC
Universidade de Aveiro, Portugal

Universidade do Minho, Portugal

Associação para a Inovação e Desenvolvimento da FCT, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2023/03/01 - 2026/02/28 Improving the Modelling of Anomalous Diffusion and Viscoelasticity: solutions to industrial problems
2022.06672.PTDC
Universidade de Trás-os-Montes e Alto Douro, Portugal

Universidade do Porto Faculdade de Engenharia, Portugal

Associação para a Inovação e Desenvolvimento da FCT, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
2020/11/01 - 2022/12/31 VALORAGUA
VALORAGUA
Researcher
Universidade do Minho, Portugal
Ongoing
2019/01/01 - 2019/12/31 Institute of Nanostructures, Nanomodelling and Nanofabrication
UID/CTM/50025/2019
Universidade do Minho, Portugal

UNINOVA Instituto de Desenvolvimento de Novas Tecnologias, Portugal

Universidade de Aveiro, Portugal

Universidade NOVA de Lisboa Faculdade de Ciências e Tecnologia, Portugal

Associação para a Inovação e Desenvolvimento da FCT, Portugal

Universidade NOVA de Lisboa, Portugal

Instituto de Nanoestruturas Nanomodelação e Nanofabricação, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2012/12/31 Projecto Estratégico - LA 25 - 2011-2012
PEst-C/CTM/LA0025/2011
Universidade do Minho, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2005/07/18 - 2008/11/18 Concepção automática de cabeças de extrusão para a produção de perfis para aplicações de elevada especificação
POCI/EME/58657/2004
Universidade da Beira Interior, Portugal

Universidade do Minho, Portugal

Universidade do Minho Instituto de Polímeros e Compósitos, Portugal
Fundação para a Ciência e a Tecnologia
Concluded

Other

Designation Funders
2019 - 2023 FCT plurianual funding
UIDB/00013/2020
UIDP/00013/2020
Researcher
Universidade do Minho Departamento de Matemática e Aplicações, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2016 - 2019 MOLDPRO – Multiscale approximation for injection molding
P2020-PTDC/EMS-ENE/3362/2014
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal

Universidade do Minho - Campus de Azurém, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2016 - 2017 Inovation in Microfluidics: Experimental and Numerical work on highprecision 3D printing.
IPC/RS/05/2016
Principal investigator
Universidade do Minho Instituto de Polímeros e Compósitos, Portugal
 Universidade do Minho Instituto de Polímeros e Compósitos
Concluded
2014 - 2016 Connection between Computational Fluid Dynamics and Discrete Element Modelling for modelling the polymer extrusion process.
Ref. EXPL/CTM-POL/1299/2013
Principal investigator
Fundação para a Ciência e a Tecnologia
Outputs

Publications

Book
  1. Fernandes, C.; Faroughi, Salah Aldin; Ferrás, Luís Jorge Lima; Afonso, Alexandre Miguel Prior. Advanced polymer simulation and processing Volume I. MDPI. 2023.
    10.3390/books978-3-0365-6665-8
  2. A. Jacinta; L.L. Ferrás. Mathematical Modelling (under development). 2020.
Book chapter
  1. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "A Filter-based Neural ODE Approach for Modelling Natural Systems with Prior Knowledge Constraints". In Lecture Notes in Artificial Intelligence. Springer International Publishing, 2023.
    Accepted
  2. Morgado, M.L.; Rebelo, M.; Ferrás, L.L.. "Finite Difference Schemes with Non-uniform Time Meshes for Distributed-Order Diffusion Equations". 2022.
    10.1007/978-3-031-04383-3_27
  3. C. Coelho; M. Fernanda P. Costa; L. L. Ferrás; A. J. Soares. "Object Detection with RetinaNet on Aerial Imagery: The Algarve Landscape". 501-516. Springer International Publishing, 2021.
    10.1007/978-3-030-86960-1_35
  4. Luis L. Ferrás; M. L. Morgado; Magda Rebelo. "A Numerical Method for the Transient Couette Flow of a Distributed-Order Viscoelastic Fluid". 411-421. Springer International Publishing, 2021.
    10.1007/978-3-030-86973-1_29
  5. M. Fernanda P. Costa; C. Coelho; L. L. Ferrás. "Optimisation Approach for Parameter Estimation of the Generalised PTT Viscoelastic Model". 481-494. Springer International Publishing, 2021.
    10.1007/978-3-030-86973-1_34
  6. L.L. Ferrás; L. Morgado, Maria; Rebelo, Magda; T. Leiva, Rosalía; Castelo, António; H. McKinley, Gareth; M. Afonso, Alexandre. "Recent Advances in Complex Fluids Modeling". In Fluid Flow Problems. IntechOpen, 2019.
    Published • 10.5772/intechopen.82689
  7. Rajkumar, Ananth; L.L. Ferrás; Fernandes, Célio; Carneiro, Olga S.; Sacramento, Alberto; Nóbrega, J. Miguel. "Differential Heating as a Strategy for Controlling the Flow Distribution in Profile Extrusion Dies". In OpenFOAM®, 109-120. Springer International Publishing, 2019.
    10.1007/978-3-319-60846-4_8
  8. Fernandes, Célio; Araujo, Manoel S. B.; L.L. Ferrás; Miguel Nóbrega, J.. "Improving the Numerical Stability of Steady-State Differential Viscoelastic Flow Solvers in OpenFOAM®". In OpenFOAM®, 269-280. Springer International Publishing, 2019.
    Published • 10.1007/978-3-319-60846-4_20
  9. Rebelo, Magda; Ferrás, Luis; Morgado, Maria Luísa; Afonso, Alexandre M.; McKinley, Gareth Huw; Castelo, Antonio; Leiva, Rosalía. "Recent Advances in Complex Fluids Modeling". InTechOpen, 2019.
    https://doi.org/10.5772/intechopen.82689
  10. Rebelo, Magda; Ferrás, Luis; Morgado, Maria Luísa; Afonso, Alexandre M.; McKinley, Gareth Huw; Castelo, Antonio; Leiva, Rosalía. "Recent Advances in Complex Fluids Modeling". InTechOpen, 2019.
    https://doi.org/10.5772/intechopen.82689
  11. Rebelo, Magda; Ferrás, Luis; Morgado, Maria Luísa; Afonso, Alexandre M.; McKinley, Gareth Huw; Castelo, Antonio; Leiva, Rosalía. "Recent Advances in Complex Fluids Modeling". InTechOpen, 2019.
    https://doi.org/10.5772/intechopen.82689
  12. L.L. Ferrás; Ford, N. J.; Morgado, M. L.; Rebelo, M.. "A Hybrid Numerical Scheme for Fractional-Order Systems". In Innovation, Engineering and Entrepreneurship, 735-742. Springer International Publishing, 2018.
    Published • 10.1007/978-3-319-91334-6_100
  13. Ferrás, L.L.; Ford, N.J.; Morgado, M.L.; Rebelo, M.. "A numerical method for the solution of the time-fractional diffusion equation". In Lecture Notes In Computer Science. 2014.
    10.1007/978-3-319-09144-0_9
Conference abstract
  1. A.M. Ribau; L.L. Ferrás; M.L. Morgado; M. Rebelo; A.M. Afonso. "Generalised Phan-Thien-Tanner fluids: new analytical and numerical studies". Paper presented in IBEREO 2019, Porto, 2019.
    Accepted
  2. A.M. Ribau; L.L. Ferrás; M.L. Morgado; M. Rebelo; A.M. Afonso. "Analytical and semi-analytical solutions for the Poiseuille-Couette flow of a generalised simplified Phan-Thien-Tanner fluid". Paper presented in CMN 2019 - Congress on Numerical Methods in Engineering, Guimarães, 2019.
    Published
  3. A.M. Ribau; L.L. Ferrás; M.L. Morgado; M. Rebelo; A.M. Afonso. "Further Developments on Complex Viscoelastic Flows". Paper presented in DCE2019 - 3rd Doctoral Congress in Engineering, Porto, 2019.
    Accepted
  4. A.M. Ribau; L.L. Ferrás; M.L. Morgado; M. Rebelo; A.M. Afonso. "Slip flows of generalised Phan-Thien-Tanner fluids: analytical and numerical studies". Paper presented in SYMCOMP 2019 - 4th International Conference on Numerical and Symbolic Computation Developments and Applications, Porto, 2019.
    Accepted
Conference paper
  1. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás; Coelho, C.; Costa, M.P.F.; Ferrás, L.L.. "A Self-Adaptive Penalty Method for Integrating Prior Knowledge Constraints into Neural ODEs". Paper presented in European Conference on Artificial Intelligence (ECAI), Kraków, 2023.
    Under revision
  2. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "A Study on Adaptive Penalty Functions in Neural ODEs for Real Systems Modeling". Paper presented in 21st International Conference of Numerical Analysis and Applied Mathematics, Crete, 2023.
    Accepted
  3. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Prior knowledge meets Neural ODEs: a two-stage training method for improved explainabilitty". Paper presented in Eleventh International Conference on Learning Representations (ICLR), Kigali, 2023.
    Accepted
  4. Carrilho, D.S.; Coelho, C.; Costa, F.M.P.; Ferrás, L.L.; Soares, A.J.. "Optimization of Traffic Lights Using Supervised Learning". 2023.
    10.1063/5.0162229
  5. Albuquerque, L.; Coelho, C.; Costa, F.M.P.; Ferrás, L.L.; Soares, A.J.. "Improving Public Parking by Using Artificial Intelligence". 2023.
    10.1063/5.0162231
  6. Coelho, C.; Costa, F.M.P.; Ferrás, L.L.. "The Influence of the Optimization Algorithm in the Solution of the Fractional Laplacian Equation by Neural Networks". 2023.
    10.1063/5.0162230
  7. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "The role of adaptive activation functions in Fractional Physics-Informed Neural Networks". Paper presented in 20th International Conference of Numerical Analysis and Applied Mathematics, Crete, 2022.
    Accepted
  8. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "The Influence of the Optimization Algorithm in the Solution of the Fractional Laplacian Equation by Neural Networks". Paper presented in 19th International Conference of Numerical Analysis and Applied Mathematics, Rhodes, 2021.
    Accepted
  9. D. S. Carrilho; C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás; A.J. Soares. "Optimization of traffic lights using Supervised Learning". Paper presented in 19th International Conference of Numerical Analysis and Applied Mathematics, Rhodes, 2021.
    Accepted
  10. L. Albuquerqe; C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás; A.J. Soares. "Improving public parking by using artificial intelligence". Paper presented in 19th International Conference of Numerical Analysis and Applied Mathematics, Rhodes, 2021.
    Accepted
  11. L.L. Ferrás; Magda Rebelo; M. Luísa Morgado. "A Distributed Order Viscoelastic Model for Small Deformations". Paper presented in SYMCOMP 2021 5th International Conference on Numerical and Symbolic Computation Developments and Applications, Évora, 2021.
    Published
  12. L.L. Ferrás. "A Distributed Order Viscoelastic Model for Small Deformations". Paper presented in SYMCOMP 2021 5th International Conference on Numerical and Symbolic Computation Developments and Applications, Évora, 2021.
    Accepted
  13. Coelho, C; M. Fernanda P. Costa; L.L. Ferrás; A.J. Soares. "Development of a machine learning model and a user interface to detect illegal swimming pools". Paper presented in SYMCOMP 2021 5th International Conference on Numerical and Symbolic Computation Developments and Applications, Évora, 2021.
    Published
  14. Coelho, C.; Costa, M. Fernanda P. ; L.L. Ferrás. "The influence of the optimisation algorithm in the solution of the Fractional Laplacian Equation by neural networks". Paper presented in 19th International Conference of Numerical Analysis and Applied Mathematics (ICNAAM 2021), 2021.
  15. Carneiro, Olga Sousa; Rajkumar, Ananth; L.L. Ferrás; Fernandes, Célio; Sacramento, Alberto; Nóbrega, João Miguel. "Computer aided die design: A new open-source methodology". Paper presented in Novel Trends in Rheology VII, Zlín, 2017.
    Published • 10.1063/1.4982987
  16. L.L. Ferrás; Ford, Neville John; Morgado, Maria Luísa; Rebelo, Magda; McKinley, Gareth Huw; Nóbrega, João Miguel. "A primer on experimental and computational rheology with fractional viscoelastic constitutive models". Paper presented in Novel Trends in Rheology VII, Zlín, 2017.
    Published • 10.1063/1.4982977
  17. O.S. Carneiro; A. Rajkumar; Célio Fernandes; L.L. Ferrás; F. Habla; J. Miguel; Carneiro, O. S.; et al. "Development and experimental assessment of a numerical modelling code to aid the design of profile extrusion cooling tools". Paper presented in ESAFORM 2017, Dublin, 2017.
    Published • 10.1063/1.5008146
  18. L.L. Ferrás; Neville Ford; M.L. Morgado; M. Rebelo; Gareth McKin. "How non-integer order derivatives can be useful to rheology". Paper presented in SYMCOMP 2017, 3rd International Conference on Numerical and Symbolic Computation: Developments and Applications, 2017.
    Published
  19. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Covas, J. A.; Hilliou, L.. "Dual-slit rheo-optical die for the characterization of process sensitive melts". 2017.
  20. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Covas, J. A.; Hilliou, L.. "Dual-slit rheo-optical die for the characterization of process sensitive melts". 2017.
  21. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Covas, J. A.; Hilliou, L.. "Dual-slit rheo-optical die for the characterization of process sensitive melts". 2017.
  22. O.S. Carneiro; L.L. Ferrás; P.F. Teixeira; Célio Fernandes; J. Miguel. "Weld lines in extrusion: Understanding the role of the flow conditions". Paper presented in Novel Trends in Rheology VI, Zlín, 2015.
    Published • https://doi.org/10.1063/1.4918887
  23. M.S.B de Araújo; Fernandes, Célio; L.L. Ferrás; Tukovic, Željko; Jasak, Hrvoje; J. Miguel. "Implementation of integral viscoelastic constitutive models in OpenFOAM® computational library". Paper presented in Novel Trends in Rheology VI, Zlín, 2015.
    10.1063/1.4918875
  24. M.L. Morgado; L.L. Ferrás; M. Rebelo. "Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient". Paper presented in 15th International Conference on Computational and Mathematical Methods in Science and Engineering, CMMSE 2015, Cadiz, 2015.
    Published
  25. L.L. Ferrás; Ford, Neville John; M.L. Morgado; J. Miguel; M. Rebelo. "Fractional bioheat equation". Paper presented in 15th International Conference on Computational and Mathematical Methods in Science and Engineering, CMMSE 2015, Cadiz, 2015.
    Published
  26. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Improvign mixing processes with the help of numerical tools". 2015.
  27. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Dispersion of fillers in viscoelastic polymer matrices using Eulerian-Lagrangian approaches". 2015.
  28. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Understanding the dispersion of fillers in polymer matrices". 2015.
  29. Araújo, M. S. B.; Ferrás, Luís Jorge Lima; Fernandes, C. S.; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "Modelling integral viscoelastic flows in OpenFOAM". 2015.
  30. Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Flow distribution in bifurcations: the role of elasticity". 2015.
  31. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Semyonov, D.; Covas, J. A.; Nóbrega, J. M.. "Evaluation of the DPMFoam solver". 2015.
  32. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Combining experimental and numerical approaches to improve dispersion efficiency in polymer nanocomposites". 2015.
  33. Araújo, M. S. B. de; Fernandes, C. S.; Ferrás, Luís Jorge Lima; Tukovic, Željko; Jasak, Hrvoje; Nóbrega, J. M.. "Development of an integral viscoelastic flow solver in OpenFOAM®". 2015.
  34. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Dispersion of fillers in viscoelastic polymer matrices using Eulerian-Lagrangian approaches". 2015.
  35. Araújo, M. S. B.; Ferrás, Luís Jorge Lima; Fernandes, C. S.; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "Modelling integral viscoelastic flows in OpenFOAM". 2015.
  36. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Semyonov, D.; Covas, J. A.; Nóbrega, J. M.. "Evaluation of the DPMFoam solver". 2015.
  37. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Improvign mixing processes with the help of numerical tools". 2015.
  38. Araújo, M. S. B. de; Fernandes, C. S.; Ferrás, Luís Jorge Lima; Tukovic, Željko; Jasak, Hrvoje; Nóbrega, J. M.. "Development of an integral viscoelastic flow solver in OpenFOAM®". 2015.
  39. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Understanding the dispersion of fillers in polymer matrices". 2015.
  40. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Combining experimental and numerical approaches to improve dispersion efficiency in polymer nanocomposites". 2015.
  41. Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Flow distribution in bifurcations: the role of elasticity". 2015.
  42. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Dispersion of fillers in viscoelastic polymer matrices using Eulerian-Lagrangian approaches". 2015.
  43. Araújo, M. S. B.; Ferrás, Luís Jorge Lima; Fernandes, C. S.; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "Modelling integral viscoelastic flows in OpenFOAM". 2015.
  44. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Semyonov, D.; Covas, J. A.; Nóbrega, J. M.. "Evaluation of the DPMFoam solver". 2015.
  45. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Improvign mixing processes with the help of numerical tools". 2015.
  46. Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Flow distribution in bifurcations: the role of elasticity". 2015.
  47. Fernandes, C. S.; Ferrás, Luís Jorge Lima; Covas, J. A.; Nóbrega, J. M.. "Understanding the dispersion of fillers in polymer matrices". 2015.
  48. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Covas, J. A.. "Combining experimental and numerical approaches to improve dispersion efficiency in polymer nanocomposites". 2015.
  49. Araújo, M. S. B. de; Fernandes, C. S.; Ferrás, Luís Jorge Lima; Tukovic, Željko; Jasak, Hrvoje; Nóbrega, J. M.. "Development of an integral viscoelastic flow solver in OpenFOAM®". 2015.
  50. L.L. Ferrás; Célio Fernandes; O. Pozo; A.M. Afonso; M.A. Alves; J. Miguel; F.T. Pinho. "Development length in channel flows of inelastic fluids described by the Sisko viscosity model". Paper presented in MEFTE 2014, Porto, 2014.
    Published
  51. L.L. Ferrás; Neville Ford; M.L. Morgado; J. Miguel. "Fractional modelling of Pennes' bioheat equation using distributed order differential equations". Paper presented in 14th International Conference on Mathematical Methods in Science and Engineering, (CMMSE 2014), Almería, 2014.
    Published
  52. O.S. Carneiro; L.L. Ferrás; F.T. Pinho. "Effect of Polymer Melt Wall Slip on the Flow Balance of Profile Extrusion Dies". Paper presented in Novel Trends in Rheology V, 2013.
    Published • 10.1063/1.4802603
  53. L.L. Ferrás; J. Miguel; F.T. Pinho. "Slip Effects on the Stick-Slip Flow of a sPTT Fluid". Paper presented in MEFTE 2012 - IV Conferência Nacional em Mecânica Dos Fluidos, Termodinâmica e Energia, Lisbon, 2012.
    Published
  54. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "The effect of wall slip on the flow oof newtonian and viscoelastic materials in plannar contractions". 2011.
  55. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of the wall slip boundary condition in a computational rheology code based on the finite volume method". 2011.
  56. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Wall slip effects in planar contraction channel flow of newtonian and sPTT fluids". 2011.
  57. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Numerical issues in the implementation of slip boundary conditions". 2011.
  58. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "The effect of wall slip on the flow oof newtonian and viscoelastic materials in plannar contractions". 2011.
  59. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of the wall slip boundary condition in a computational rheology code based on the finite volume method". 2011.
  60. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Wall slip effects in planar contraction channel flow of newtonian and sPTT fluids". 2011.
  61. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Numerical issues in the implementation of slip boundary conditions". 2011.
  62. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "The effect of wall slip on the flow oof newtonian and viscoelastic materials in plannar contractions". 2011.
  63. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Numerical issues in the implementation of slip boundary conditions". 2011.
  64. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of the wall slip boundary condition in a computational rheology code based on the finite volume method". 2011.
  65. Ferrás, Luís Jorge Lima; Carneiro, O. S.; Pinho, F. T.; Nóbrega, J. M.. "Wall slip effects in planar contraction channel flow of newtonian and sPTT fluids". 2011.
  66. L.L. Ferrás; J. Miguel; F.T. Pinho. "Explicit Versus Implicit Numerical Implementations Of The Wall Slip Boundary Conditions". Paper presented in Semana da Engenharia 2010 - Universidade do Minho, Guimarães, 2010.
    Published
  67. L.L. Ferrás; J. Miguel; F.T. Pinho. "Implementation of a Slip Boundary Condition in a Finite Volume Code Aimed to Predict Fluid Flows". Paper presented in II Conferência Nacional de Métodos Numéricos em Mecânica de Fluidos e Termodinâmica, Aveiro, 2008.
    Published
  68. L.L. Ferrás; J. Miguel; F.T. Pinho; O.S. Carneiro. "Profile Extrusion Die Design: The Effect Of Wall Slip". Paper presented in PPS-23, Salvador, 2007.
    Published
Conference poster
  1. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Improving Neural ODEs Explainability: A Two-Stage Training Method for Modeling Constrained Natural Systems". Paper presented in European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases, Turin, Italy (Accepted), 2023.
  2. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Not All Roses: The Impact of Neural Networks for Hydropower Plant Management in Agriculture". Paper presented in ECAI 2023 Workshop on Artificial Intelligence for Sustainability, 2023.
  3. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Fractional Physics Informed Neural Networks with adaptive activation functions: a numerical study". Paper presented in Challenges in Numerical Analysis and Scientific Computing, 2022.
  4. Costa, M. Fernanda P. ; C. Coelho; L.L. Ferrás. "Parameter Estimation for Constitutive Differential Equations: An Optimization Approach". Paper presented in Open Day CMAT, 2021.
  5. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás; A.J. Soares. "Implementation of a Deep Learning model capable of detecting objects from satellite images". Paper presented in Open Day CMAT, 2021.
  6. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Neural Networks and Fractional Differential Equations". Paper presented in Open Day CMAT, 2021.
  7. L.L. Ferrás; N. Ford; M. Rebelo; M.L. Morgado; J. Miguel; G. McKinley. "Fractional Viscoelastic Models". Paper presented in VI Annual Meeting i3N (Universidade Nova de Lisboa), 2017.
  8. W. Galuppo; C. Fernandes; L.L. Ferrás; J. Miguel. "Simulation Of The Filling Stage Of Injection Moulding Process Using Openfoam®". Paper presented in OpenFOAM Workshop, Exeter, UK, 2017, 2017.
  9. C. Fernandes; L.L. Ferrás; M.S.B de Araújo; J. Miguel. "Development-Lenght Requirements In Planar Channel Flows Of A Fluid Obeying The Sisko Model". Paper presented in OpenFOAM Workshop, Guimarães, Portugal, 2016, 2016.
  10. A. Magalhães; C. Fernandes; L.L. Ferrás. "Simulation Of The Injection Molding Filling Stage". Paper presented in OpenFOAM Workshop, Guimarães, Portugal, 2016, 2016.
  11. A. Rajkumar; L.L. Ferrás; C. Fernandes; O.S. Carneiro; J. Miguel. "Development Of A New Design Methodology For Complex Profile Extrusion Die With The Aid Of Openfoam". Paper presented in OpenFOAM Workshop, Guimarães, Portugal, 2016, 2016.
  12. L.L. Ferrás; O.S. Carneiro; Y. Sitotaw; C. Fernandes; J. Miguel. "Weld Lines In The Extrusion Process: A Numerical Study". Paper presented in OpenFOAM Workshop, Guimarães, Portugal, 2016, 2016.
    10.1115/ipc2008-64632
  13. M.S.B. Araujo; C. Fernandes; L.L. Ferrás; J. Miguel. "Improvements and Assessment Of The Integral Viscoelastic Solver In Openfoam". Paper presented in OpenFOAM Workshop, Guimarães, Portugal, 2016, 2016.
  14. M. Rebelo; M.L. Morgado; L.L. Ferrás; N. Ford. "A spectral collocation method for the diffusion equation with distributed order in time". Paper presented in Fifth International Workshop on Analysis and Numerical Approximation of Singular Problems, Algarve, Portugal, 2015, 2015.
  15. C. Fernandes; A. Rajkumar; D. Semyonov; L.L. Ferrás; M.S.B. Araujo; O.S. Carneiro; J. Miguel. "Computational Rheology". Paper presented in I3N Meeting, Aveiro, Portugal, 2015, 2015.
  16. L.L. Ferrás; C. Fernandes; J. Miguel; J. Covas. "Studies On Dispersion Efficiency Of Polymer Nanocomposites". Paper presented in I3N Meeting, Aveiro, Portugal, 2015, 2015.
  17. L.L. Ferrás; A. Afonso; J. Miguel; M.A. Alves; F.T. Pinho. "Development lengths for fluid flow in microchannels under the influence of slip boundary conditions". Paper presented in I3N – IV Annual Meeting 2012, Quiaios, Portugal, March 9-10, 2012, 2012.
  18. L.L. Ferrás; A. Afonso; M.A. Alves; J. Miguel; F.T. Pinho. "Analytical solutions for laminar and electroosmotic fluid flow under slip boundary conditions". Paper presented in I3N – IV Annual Meeting 2012, Quiaios, Portugal, March 9-10, 2012, 2012.
  19. L.L. Ferrás; J. Miguel; F.T. Pinho; O.S. Carneiro. "On the Effect of the Wall Slip Boundary Conditon". Paper presented in Semana da Escola de Engenharia, Universidade do Minho, Guimarães, Portugal, October 2011, 2011.
  20. L.L. Ferrás; O.S. Carneiro; F.T. Pinho; J. Miguel. "The Effect of Wall Slip on the Flow of Newtonian and Viscoelastic Materials in Plannar Contractions". Paper presented in III Annual Meeting of the I3N – Institute of Nanostructures, Nanomodelling and Nanofabrication, Fátima, Portugal, February 2011, 2011.
  21. L.L. Ferrás; O.S. Carneiro; F.T. Pinho; J. Miguel. "Numerical Issues in the Implementation Of Slip Boundary Conditions". Paper presented in Workshop Mathematical Modelling and Numerical Simulations for Engineering Appliecations – Setembro 2011, Braga, Portugal, 2011.
  22. J. Miguel; O.S. Carneiro; L.L. Ferrás; F.T. Pinho. "Rheology & Extrusion Die Design". Paper presented in Rheoprocessing 2008. Guimarães, Portugal: June, 2008, 2008.
Journal article
  1. Célio Fernandes; Luís L. Ferrás; Alexandre M. Afonso. "Polymer Physics: From Theory to Experimental Applications". Polymers (2024): https://doi.org/10.3390/polym16060768.
    10.3390/polym16060768
  2. Hugo A. Castillo-Sánchez; Manoel S. B. de Araújo; Juliana Bertoco; C. Fernandes; L. L. Ferrás; Antonio Castelo. "Numerical simulation of a thixotropic-viscoelastic model in contraction geometries". Physics of Fluids (2024): https://doi.org/10.1063/5.0186505.
    10.1063/5.0186505
  3. O. Ayar; C. Fernandes; L. L. Ferrás; M. A. Alves. "Numerical simulations of suspensions of rigid spheres in shear-thinning viscoelastic fluids". Physics of Fluids (2023): https://doi.org/10.1063/5.0171761.
    10.1063/5.0171761
  4. Juliana Bertoco; Antonio Castelo; Luís L. Ferrás; Célio Fernandes. "Numerical Simulation of Three-Dimensional Free Surface Flows Using the K–BKZ–PSM Integral Constitutive Equation". Polymers (2023): https://doi.org/10.3390/polym15183705.
    10.3390/polym15183705
  5. L L Ferrás; A M Afonso. "New insights into the extended and generalised PTT constitutive differential equations: weak flows". Fluid Dynamics Research (2023): https://doi.org/10.1088/1873-7005/acd0d4.
    10.1088/1873-7005/acd0d4
  6. Célio Fernandes; Luis L. Ferrás; Alexandre M. Afonso. "Numerical Simulation of the Production of Core-Shell Microparticles". Semina: Ciências Exatas e Tecnológicas (2023): https://doi.org/10.5433/1679-0375.2023.v44.47206.
    10.5433/1679-0375.2023.v44.47206
  7. P.R. Resende; L.L. Ferrás; A.M. Afonso. "Flame dynamics of hydrogen/air mixture in a wavy micro-channel". International Journal of Hydrogen Energy (2023): https://doi.org/10.1016/j.ijhydene.2022.12.096.
    10.1016/j.ijhydene.2022.12.096
  8. Luís L. Ferrás; M. Luísa Morgado; Magda Rebelo. "A generalised distributed-order Maxwell model". Mathematical Methods in the Applied Sciences (2023): https://doi.org/10.1002/mma.8516.
    10.1002/mma.8516
  9. Luís L. Ferrás; Alexandre M. Afonso. "Viscoelasticity: Mathematical Modelling, Numerical Simulations, and Experimental Work". Applied Sciences (2023): https://doi.org/10.3390/app13021022.
    10.3390/app13021022
  10. Coelho, C.; Costa, M. Fernanda P. ; L.L. Ferrás. "A Suite of XAI techniques for Understanding Neural Ordinary Differential Equations". (2023):
    Submitted
  11. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. "Enhancing Continuous Time Series Modelling with a Latent ODE-LSTM Approach". (2023):
    Submitted
  12. Ferrás, L.L.; Rebelo, M.; Morgado, M.L.. "The role of the weight function in the generalised distributed-order Maxwell model: The case of a distributed-springpot and a dashpot". Applied Mathematical Modelling 122 (2023): 844-860. http://www.scopus.com/inward/record.url?eid=2-s2.0-85164683734&partnerID=MN8TOARS.
    10.1016/j.apm.2023.06.029
  13. Paulo, G.S.; Viezel, C.; Ferrás, L.L.. "A robust finite difference method for confined and free surface flows with slip at the wall". Journal of Non-Newtonian Fluid Mechanics 321 (2023): http://www.scopus.com/inward/record.url?eid=2-s2.0-85174677982&partnerID=MN8TOARS.
    10.1016/j.jnnfm.2023.105127
  14. Fernandes, C.; Ferrás, Luís Jorge Lima; Afonso, Alexandre Miguel Prior; Célio Fernandes; Luís L. Ferrás; Alexandre Afonso. "A primer on CFD-DEM for polymer-filled suspensions". Applied Sciences (2023): https://hdl.handle.net/1822/82733.
    10.3390/app13042466
  15. Célio Fernandes; Salah A. Faroughi; Luís L. Ferrás; Alexandre M. Afonso. "Advanced Polymer Simulation and Processing". Polymers 14 12 (2022): 2480-2480. https://doi.org/10.3390/polym14122480.
    10.3390/polym14122480
  16. Juliana Bertoco; Rosalía T. Leiva; Luís L. Ferrás; Alexandre M. Afonso; Antonio Castelo. "Development Length of Fluids Modelled by the gPTT Constitutive Differential Equation". Applied Sciences (2021): https://doi.org/10.3390/app112110352.
    10.3390/app112110352
  17. Francisco Barros; Nuno Viriato; Carlos Veiga Rodrigues; Luís L. Ferrás; Mário A. P. Vaz; Alexandre M. Afonso. "Numerical study of hydrodynamic resistance on a sportive sprint hull". Semina: Ciências Exatas e Tecnológicas (2021): https://doi.org/10.5433/1679-0375.2021v42n2p131.
    10.5433/1679-0375.2021v42n2p131
  18. Ângela M. Ribau; Nelson D. Gonçalves; Luís L. Ferrás; Alexandre M. Afonso. "Flow Structures Identification through Proper Orthogonal Decomposition: The Flow around Two Distinct Cylinders". Fluids 6 11 (2021): 384-384. https://doi.org/10.3390/fluids6110384.
    10.3390/fluids6110384
  19. M. Luísa Morgado; Magda Rebelo; Luís L. Ferrás. "Stable and Convergent Finite Difference Schemes on NonuniformTime Meshes for Distributed-Order Diffusion Equations". Mathematics (2021): https://doi.org/10.3390/math9161975.
    10.3390/math9161975
  20. "Hydrodynamic entrance length for laminar flow in 3D rectangular micro-channels". fluids (2021): https://doi.org/10.3390/fluids6070240.
    https://doi.org/10.3390/fluids6070240
  21. A. M. Ribau; L. L. Ferrás; M. L. Morgado; M. Rebelo; M. A. Alves; F. T. Pinho; A. M. Afonso. "A study on mixed electro-osmotic/pressure-driven microchannel flows of a generalised Phan-Thien–Tanner fluid". Journal of Engineering Mathematics (2021): https://doi.org/10.1007/s10665-020-10071-6.
    10.1007/s10665-020-10071-6
  22. Galuppo, W.C.; Magalhães, A.; Ferrás, L.L.; Nóbrega, J.M.; Fernandes, C.. "New boundary conditions for simulating the filling stage of the injection molding process". Engineering Computations (Swansea, Wales) 38 2 (2021): 762-778. http://www.scopus.com/inward/record.url?eid=2-s2.0-85087774860&partnerID=MN8TOARS.
    10.1108/EC-04-2020-0190
  23. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís L.. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/10362/128515.
    https://doi.org/10.3390/math9161975
  24. Ribau, A. M.; Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.; Alves, M. A.; Pinho, F. T.; Afonso, A. M.. "A study on mixed electro-osmotic/pressure-driven microchannel flows of a generalised Phan-Thien–Tanner fluid". (2021): http://hdl.handle.net/1822/75249.
    10.1007/s10665-020-10071-6
  25. Barros, Francisco; Viriato, Nuno; Veiga Rodrigues, Carlos; Ferrás, Luís Jorge Lima; Vaz, Mário A. P.; Afonso, Alexandre M.. "Numerical study of hydrodynamic resistance on a sportive sprint hull". (2021): https://hdl.handle.net/1822/75313.
    10.5433/1679-0375.2021v42n2p131
  26. Bertoco, Juliana; Leiva, Rosalía T.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.; Castelo, Antonio. "Development length of fluids modelled by the gPTT constitutive differential equation". (2021): http://hdl.handle.net/1822/75239.
    10.3390/app112110352
  27. Ferreira, Germán; Sucena, Artur; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Afonso, Alexandre M.. "Hydrodynamic entrance length for laminar flow in microchannels with rectangular cross section". (2021): http://hdl.handle.net/1822/74595.
    10.3390/fluids6070240
  28. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís Jorge Lima. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/1822/74596.
    10.3390/math9161975
  29. Ribau, Ângela M.; Gonçalves, Nelson D.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.. "Flow structures identification through proper orthogonal decomposition: The flow around two distinct cylinders". (2021): https://hdl.handle.net/1822/75285.
    10.3390/fluids6110384
  30. Ferrás, Luís Jorge Lima; Ford, Neville; Morgado, Maria Luisa; Rebelo, Magda. "High-order methods for systems of fractional ordinary differential equations and their application to time-fractional diffusion equations". (2021): https://hdl.handle.net/1822/66733.
    10.1007/s11786-019-00448-x
  31. Ferrás, Luís Jorge Lima; Fernandes, C.; Semyonov, Denis; Nóbrega, J. M.; Covas, J. A.. "Dispersion of graphite nanoplates in polypropylene by melt mixing: the effects of hydrodynamic stresses and residence time". (2021): http://hdl.handle.net/1822/68912.
    10.3390/polym13010102
  32. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís L.. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/10362/128515.
    https://doi.org/10.3390/math9161975
  33. Ribau, A. M.; Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.; Alves, M. A.; Pinho, F. T.; Afonso, A. M.. "A study on mixed electro-osmotic/pressure-driven microchannel flows of a generalised Phan-Thien–Tanner fluid". (2021): http://hdl.handle.net/1822/75249.
    10.1007/s10665-020-10071-6
  34. Barros, Francisco; Viriato, Nuno; Veiga Rodrigues, Carlos; Ferrás, Luís Jorge Lima; Vaz, Mário A. P.; Afonso, Alexandre M.. "Numerical study of hydrodynamic resistance on a sportive sprint hull". (2021): https://hdl.handle.net/1822/75313.
    10.5433/1679-0375.2021v42n2p131
  35. Bertoco, Juliana; Leiva, Rosalía T.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.; Castelo, Antonio. "Development length of fluids modelled by the gPTT constitutive differential equation". (2021): http://hdl.handle.net/1822/75239.
    10.3390/app112110352
  36. Ferreira, Germán; Sucena, Artur; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Afonso, Alexandre M.. "Hydrodynamic entrance length for laminar flow in microchannels with rectangular cross section". (2021): http://hdl.handle.net/1822/74595.
    10.3390/fluids6070240
  37. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís Jorge Lima. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/1822/74596.
    10.3390/math9161975
  38. Ribau, Ângela M.; Gonçalves, Nelson D.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.. "Flow structures identification through proper orthogonal decomposition: The flow around two distinct cylinders". (2021): https://hdl.handle.net/1822/75285.
    10.3390/fluids6110384
  39. Ferrás, Luís Jorge Lima; Fernandes, C.; Semyonov, Denis; Nóbrega, J. M.; Covas, J. A.. "Dispersion of graphite nanoplates in polypropylene by melt mixing: the effects of hydrodynamic stresses and residence time". (2021): http://hdl.handle.net/1822/68912.
    10.3390/polym13010102
  40. Ferrás, Luís Jorge Lima; Ford, Neville; Morgado, Maria Luisa; Rebelo, Magda. "High-order methods for systems of fractional ordinary differential equations and their application to time-fractional diffusion equations". (2021): https://hdl.handle.net/1822/66733.
    10.1007/s11786-019-00448-x
  41. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís Jorge Lima. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/1822/74596.
    10.3390/math9161975
  42. Morgado, M. Luísa; Rebelo, Magda; Ferrás, Luís L.. "Stable and convergent finite difference schemes on nonuniformtime meshes for distributed-order diffusion equations". (2021): http://hdl.handle.net/10362/128515.
    https://doi.org/10.3390/math9161975
  43. Bertoco, Juliana; Leiva, Rosalía T.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.; Castelo, Antonio. "Development length of fluids modelled by the gPTT constitutive differential equation". (2021): http://hdl.handle.net/1822/75239.
    10.3390/app112110352
  44. Ribau, Ângela M.; Gonçalves, Nelson D.; Ferrás, Luís Jorge Lima; Afonso, Alexandre M.. "Flow structures identification through proper orthogonal decomposition: The flow around two distinct cylinders". (2021): https://hdl.handle.net/1822/75285.
    10.3390/fluids6110384
  45. Ferreira, Germán; Sucena, Artur; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Afonso, Alexandre M.. "Hydrodynamic entrance length for laminar flow in microchannels with rectangular cross section". (2021): http://hdl.handle.net/1822/74595.
    10.3390/fluids6070240
  46. Ribau, A. M.; Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.; Alves, M. A.; Pinho, F. T.; Afonso, A. M.. "A study on mixed electro-osmotic/pressure-driven microchannel flows of a generalised Phan-Thien–Tanner fluid". (2021): http://hdl.handle.net/1822/75249.
    10.1007/s10665-020-10071-6
  47. Barros, Francisco; Viriato, Nuno; Veiga Rodrigues, Carlos; Ferrás, Luís Jorge Lima; Vaz, Mário A. P.; Afonso, Alexandre M.. "Numerical study of hydrodynamic resistance on a sportive sprint hull". (2021): https://hdl.handle.net/1822/75313.
    10.5433/1679-0375.2021v42n2p131
  48. Ferrás, Luís Jorge Lima; Fernandes, C.; Semyonov, Denis; Nóbrega, J. M.; Covas, J. A.. "Dispersion of graphite nanoplates in polypropylene by melt mixing: the effects of hydrodynamic stresses and residence time". (2021): http://hdl.handle.net/1822/68912.
    10.3390/polym13010102
  49. Ferrás, Luís Jorge Lima; Ford, Neville; Morgado, Maria Luisa; Rebelo, Magda. "High-order methods for systems of fractional ordinary differential equations and their application to time-fractional diffusion equations". (2021): https://hdl.handle.net/1822/66733.
    10.1007/s11786-019-00448-x
  50. Luís Lima Ferrás; Célio Fernandes; Denis Semyonov; João Miguel Nóbrega; José António Covas. "Dispersion of Graphite Nanoplates in Polypropylene by Melt Mixing: The Effects of Hydrodynamic Stresses and Residence Time". Polymers (2020): https://doi.org/10.3390/polym13010102.
    10.3390/polym13010102
  51. L. L. Ferrás; A. M. Afonso; M. A. Alves; J. M. Nóbrega; F. T. Pinho. "Newtonian and viscoelastic fluid flows through an abrupt 1:4 expansion with slip boundary conditions". Physics of Fluids (2020): https://doi.org/10.1063/1.5145092.
    10.1063/1.5145092
  52. A.M. Ribau; L.L. Ferrás; M.L. Morgado; M. Rebelo; A.M. Afonso. "Analytical and numerical studies for slip flows of a generalised Phan-Thien–Tanner fluid". ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik (2020): https://doi.org/10.1002/zamm.201900183.
    In press • https://doi.org/10.1002/zamm.201900183
  53. L.L. Ferrás; Ford, Neville; Morgado, Maria Luísa; Rebelo, Magda. "High-Order Methods for Systems of Fractional Ordinary Differential Equations and Their Application to Time-Fractional Diffusion Equations". Mathematics in Computer Science (2020): http://dx.doi.org/10.1007/s11786-019-00448-x.
    In press • 10.1007/s11786-019-00448-x
  54. L.L. Ferrás; A.M. Afonso; M.A. Alves; J. Miguel; F.T. Pinho. "Newtonian and viscoelastic fluid flows through an abrupt 1:4 expansion with slip boundary conditions". Physics of Fluids (2020):
    Under revision • 10.1063/1.5145092
  55. G. Ferreira; A. Sucena; L.L. Ferrás; M.A. Alves; F.T. Pinho; A.M. Afonso. "Hydrodynamic entrance length for laminar flow in 3D rectangular micro-channels". European Journal of Mechanics - B/Fluids (2020):
    Under revision • 10.3390/fluids6070240
  56. F. Barros; N. Viriato; C. Rodrigues; L.L. Ferrás; M. Vaz; A.M. Afonso. "Numerical study of a kayak hull design on calm water resistance". Sports Engineering (SPEN) (2020):
    Under revision
  57. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Newtonian and viscoelastic fluid flows through an abrupt 1:4 expansion with slip boundary conditions". (2020): http://hdl.handle.net/1822/71849.
    10.1063/1.5145092
  58. Galuppo, Wagner de Campos; Magalhaes, Ana; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Fernandes, C.. "New boundary conditions for simulating the filling stage of the injection molding process". (2020): http://hdl.handle.net/1822/68436.
    10.1108/EC-04-2020-0190
  59. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Newtonian and viscoelastic fluid flows through an abrupt 1:4 expansion with slip boundary conditions". (2020): http://hdl.handle.net/1822/71849.
    10.1063/1.5145092
  60. Galuppo, Wagner de Campos; Magalhaes, Ana; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Fernandes, C.. "New boundary conditions for simulating the filling stage of the injection molding process". (2020): http://hdl.handle.net/1822/68436.
    10.1108/EC-04-2020-0190
  61. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Newtonian and viscoelastic fluid flows through an abrupt 1:4 expansion with slip boundary conditions". (2020): http://hdl.handle.net/1822/71849.
    10.1063/1.5145092
  62. Galuppo, Wagner de Campos; Magalhaes, Ana; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Fernandes, C.. "New boundary conditions for simulating the filling stage of the injection molding process". (2020): http://hdl.handle.net/1822/68436.
    10.1108/EC-04-2020-0190
  63. Ribau, Ângela M.; L.L. Ferrás; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-Analytical Solutions for the Poiseuille–Couette Flow of a Generalised Phan-Thien–Tanner Fluid". Fluids 4 3 (2019): 129. http://dx.doi.org/10.3390/fluids4030129.
    10.3390/fluids4030129
  64. L.L. Ferrás; Morgado, M.L.; Rebelo, M.; McKinley, Gareth H.; Afonso, A.M.. "A generalised Phan–Thien—Tanner model". Journal of Non-Newtonian Fluid Mechanics 269 (2019): 88-99. http://dx.doi.org/10.1016/j.jnnfm.2019.06.001.
    Published • 10.1016/j.jnnfm.2019.06.001
  65. Fernandes, Célio; L.L. Ferrás; Habla, Florian; Carneiro, Olga Sousa; Nóbrega, João Miguel. "Implementation of partial slip boundary conditions in an open-source finite-volume-based computational library". Journal of Polymer Engineering 39 4 (2019): 377-387. http://dx.doi.org/10.1515/polyeng-2018-0343.
    Published • 10.1515/polyeng-2018-0343
  66. Ribau, Ângela M.; Ferrás, Luís L.; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the Poiseuille–Couette flow of a generalised Phan-Thien–Tanner fluid". (2019): http://hdl.handle.net/10362/98743.
    https://doi.org/10.3390/fluids4030129
  67. Ribau, Angela M.; Ferrás, Luís Jorge Lima; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the poiseuille-couette flow of a generalised Phan-Thien-Tanner fluid". (2019): http://hdl.handle.net/1822/66805.
    10.3390/fluids4030129
  68. Fernandes, Célio; Ferrás, Luís Jorge Lima; Habla, Florian; Carneiro, O. S.; Nóbrega, J. M.. "Implementation of partial slip boundary conditions in an open-source finite-volume-based computational library". (2019): http://hdl.handle.net/1822/63464.
    10.1515/polyeng-2018-0343
  69. Ribau, Ângela M.; Ferrás, Luís L.; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the Poiseuille–Couette flow of a generalised Phan-Thien–Tanner fluid". (2019): http://hdl.handle.net/10362/98743.
    https://doi.org/10.3390/fluids4030129
  70. Fernandes, Célio; Ferrás, Luís Jorge Lima; Habla, Florian; Carneiro, O. S.; Nóbrega, J. M.. "Implementation of partial slip boundary conditions in an open-source finite-volume-based computational library". (2019): http://hdl.handle.net/1822/63464.
    10.1515/polyeng-2018-0343
  71. Ribau, Angela M.; Ferrás, Luís Jorge Lima; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the poiseuille-couette flow of a generalised Phan-Thien-Tanner fluid". (2019): http://hdl.handle.net/1822/66805.
    10.3390/fluids4030129
  72. Ribau, Ângela M.; Ferrás, Luís L.; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the Poiseuille–Couette flow of a generalised Phan-Thien–Tanner fluid". (2019): http://hdl.handle.net/10362/98743.
    https://doi.org/10.3390/fluids4030129
  73. Ribau, Angela M.; Ferrás, Luís Jorge Lima; Morgado, Maria L.; Rebelo, Magda; Afonso, Alexandre M.. "Semi-analytical solutions for the poiseuille-couette flow of a generalised Phan-Thien-Tanner fluid". (2019): http://hdl.handle.net/1822/66805.
    10.3390/fluids4030129
  74. Fernandes, Célio; Ferrás, Luís Jorge Lima; Habla, Florian; Carneiro, O. S.; Nóbrega, J. M.. "Implementation of partial slip boundary conditions in an open-source finite-volume-based computational library". (2019): http://hdl.handle.net/1822/63464.
    10.1515/polyeng-2018-0343
  75. L.L. Ferrás; Cavadas, A.S.; Resende, P.R.; Afonso, A.M.; Pinho, F.T.. "Effect of the solvent viscosity on pure electro-osmotic flow of viscoelastic fluids". Journal of Non-Newtonian Fluid Mechanics 259 (2018): 125-129. http://dx.doi.org/10.1016/j.jnnfm.2018.04.008.
    Published • 10.1016/j.jnnfm.2018.04.008
  76. L.L. Ferrás; Ford, Neville J.; Morgado, Maria Luísa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, João M.. "Theoretical and numerical analysis of unsteady fractional viscoelastic flows in simple geometries". Computers & Fluids 174 (2018): 14-33. http://dx.doi.org/10.1016/j.compfluid.2018.07.004.
    Published • 10.1016/j.compfluid.2018.07.004
  77. Fernandes, C.; Semyonov, D.; L.L. Ferrás; Nóbrega, J. Miguel. "Validation of the CFD-DPM solver DPMFoam in OpenFOAM through analytical, numerical and experimental comparisons". Granular Matter 20 4 (2018): http://dx.doi.org/10.1007/s10035-018-0834-x.
    Published • 10.1007/s10035-018-0834-x
  78. M.S.B. Araújo; C. Fernandes; L.L. Ferrás; ¿. Tukovic; H. Jasak; J.M. Nóbrega. "A stable numerical implementation of integral viscoelastic models in the OpenFOAM®computational library". Computers & Fluids 172 (2018): 728-740. https://doi.org/10.1016/j.compfluid.2018.01.004.
    10.1016/j.compfluid.2018.01.004
  79. Fernandes, C.; L.L. Ferrás; Araujo, M.S.; Nóbrega, J.M.. "Development length in planar channel flows of inelastic non-Newtonian fluids". Journal of Non-Newtonian Fluid Mechanics 255 (2018): 13-18. http://dx.doi.org/10.1016/j.jnnfm.2018.02.011.
    10.1016/j.jnnfm.2018.02.011
  80. Teixeira, P.F.; L.L. Ferrás; Hilliou, L.; Covas, J.A.. "A new double-slit rheometrical die for in-process characterization and extrusion of thermo-mechanically sensitive polymer systems". Polymer Testing 66 (2018): 137-145. http://dx.doi.org/10.1016/j.polymertesting.2018.01.013.
    Published • 10.1016/j.polymertesting.2018.01.013
  81. L.L. Ferrás; Yalew Sitotaw; Célio Fernandes; João M. Nóbrega; Olga S. Carneiro. "A numerical and experimental study on weld lines formation and strength in extrusion". Polymer Engineering & Science 58 3 (2018): 249-260. https://doi.org/10.1002/pen.24551.
    Published • 10.1002/pen.24551
  82. L.L. Ferrás. "A Stable Numerical Implementation of Integral Viscoelastic Models in the OpenFOAM(R) Computational Library". Computers and Fluids (2018):
  83. L.L. Ferrás; Rajkumar, A.; Fernandes, C.; Carneiro, O. S.; Sacramento, A.; Nóbrega, J. M.; Ferrás, Luís. "An Open Source Framework for the Computer Aided Design of Complex Profile Extrusion Dies". International Polymer Processing 33 2 (2018): 276-285. http://dx.doi.org/10.3139/217.3514.
    Published • 10.3139/217.3514
  84. Ferrás, Luís Jorge Lima; Sitotaw, Yalew; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.. "A numerical and experimental study on weld lines formation and strength in extrusion". (2018): http://hdl.handle.net/1822/59430.
    10.1002/pen.24551
  85. Araujo, M. S. B.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "A stable numerical implementation of integral viscoelastic models in the OpenFOAM (R) computational library". (2018): http://hdl.handle.net/1822/59424.
    10.1016/j.compfluid.2018.01.004
  86. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. "Theoretical and numerical analysis of unsteady fractional viscoelastic flows in simple geometries". (2018): http://hdl.handle.net/1822/59453.
    10.1016/j.compfluid.2018.07.004
  87. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Araujo, M. S.; Nóbrega, J. M.. "Development length in planar channel flows of inelastic non-Newtonian fluids". (2018): http://hdl.handle.net/1822/59425.
    10.1016/j.jnnfm.2018.02.011
  88. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Hilliou, L.; Covas, J. A.. "A new double-slit rheometrical die for in-process characterization and extrusion of thermo-mechanically sensitive polymer systems". (2018): http://hdl.handle.net/1822/63453.
    10.1016/j.polymertesting.2018.01.013
  89. Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Carneiro, O. S.; Nóbrega, J. M.. "Guidelines for balancing the flow in extrusion dies: the influence of the material rheology". (2018): http://hdl.handle.net/1822/59428.
    10.1515/polyeng-2016-0449
  90. Fernandes, Célio Bruno Pinto; Semyonov, D.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. "Validation of the CFD-DPM solver DPMFoam in OpenFOAM (R) through analytical, numerical and experimental comparisons". (2018): http://hdl.handle.net/1822/59334.
    10.1007/s10035-018-0834-x
  91. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Hilliou, L.; Covas, J. A.. "A new double-slit rheometrical die for in-process characterization and extrusion of thermo-mechanically sensitive polymer systems". (2018): http://hdl.handle.net/1822/63453.
    10.1016/j.polymertesting.2018.01.013
  92. Ferrás, Luís Jorge Lima; Sitotaw, Yalew; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.. "A numerical and experimental study on weld lines formation and strength in extrusion". (2018): http://hdl.handle.net/1822/59430.
    10.1002/pen.24551
  93. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Araujo, M. S.; Nóbrega, J. M.. "Development length in planar channel flows of inelastic non-Newtonian fluids". (2018): http://hdl.handle.net/1822/59425.
    10.1016/j.jnnfm.2018.02.011
  94. Fernandes, Célio Bruno Pinto; Semyonov, D.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. "Validation of the CFD-DPM solver DPMFoam in OpenFOAM (R) through analytical, numerical and experimental comparisons". (2018): http://hdl.handle.net/1822/59334.
    10.1007/s10035-018-0834-x
  95. Araujo, M. S. B.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "A stable numerical implementation of integral viscoelastic models in the OpenFOAM (R) computational library". (2018): http://hdl.handle.net/1822/59424.
    10.1016/j.compfluid.2018.01.004
  96. Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Carneiro, O. S.; Nóbrega, J. M.. "Guidelines for balancing the flow in extrusion dies: the influence of the material rheology". (2018): http://hdl.handle.net/1822/59428.
    10.1515/polyeng-2016-0449
  97. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. "Theoretical and numerical analysis of unsteady fractional viscoelastic flows in simple geometries". (2018): http://hdl.handle.net/1822/59453.
    10.1016/j.compfluid.2018.07.004
  98. Teixeira, Paulo Francisco; Ferrás, Luís Jorge Lima; Hilliou, L.; Covas, J. A.. "A new double-slit rheometrical die for in-process characterization and extrusion of thermo-mechanically sensitive polymer systems". (2018): http://hdl.handle.net/1822/63453.
    10.1016/j.polymertesting.2018.01.013
  99. Ferrás, Luís Jorge Lima; Sitotaw, Yalew; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.. "A numerical and experimental study on weld lines formation and strength in extrusion". (2018): http://hdl.handle.net/1822/59430.
    10.1002/pen.24551
  100. Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Araujo, M. S.; Nóbrega, J. M.. "Development length in planar channel flows of inelastic non-Newtonian fluids". (2018): http://hdl.handle.net/1822/59425.
    10.1016/j.jnnfm.2018.02.011
  101. Araujo, M. S. B.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. "A stable numerical implementation of integral viscoelastic models in the OpenFOAM (R) computational library". (2018): http://hdl.handle.net/1822/59424.
    10.1016/j.compfluid.2018.01.004
  102. Fernandes, Célio Bruno Pinto; Semyonov, D.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. "Validation of the CFD-DPM solver DPMFoam in OpenFOAM (R) through analytical, numerical and experimental comparisons". (2018): http://hdl.handle.net/1822/59334.
    10.1007/s10035-018-0834-x
  103. Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Carneiro, O. S.; Nóbrega, J. M.. "Guidelines for balancing the flow in extrusion dies: the influence of the material rheology". (2018): http://hdl.handle.net/1822/59428.
    10.1515/polyeng-2016-0449
  104. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. "Theoretical and numerical analysis of unsteady fractional viscoelastic flows in simple geometries". (2018): http://hdl.handle.net/1822/59453.
    10.1016/j.compfluid.2018.07.004
  105. Fernandes, C.; Araujo, M.S.B.; L.L. Ferrás; Miguel Nóbrega, J.. "Improved both sides diffusion (iBSD): A new and straightforward stabilization approach for viscoelastic fluid flows". Journal of Non-Newtonian Fluid Mechanics 249 (2017): 63-78. http://dx.doi.org/10.1016/j.jnnfm.2017.09.008.
    Published • 10.1016/j.jnnfm.2017.09.008
  106. Khaliq, Muhammad Hussam; Gomes, Rui; Fernandes, Célio; Nóbrega, João; Carneiro, Olga Sousa; L.L. Ferrás. "On the use of high viscosity polymers in the fused filament fabrication process". Rapid Prototyping Journal 23 4 (2017): 727-735. http://dx.doi.org/10.1108/rpj-02-2016-0027.
    Published • 10.1108/rpj-02-2016-0027
  107. Rajkumar, A.; L.L. Ferrás; Fernandes, C.; Carneiro, O. S.; Becker, M.; Nóbrega, J. M.. "Design Guidelines to Balance the Flow Distribution in Complex Profile Extrusion Dies". International Polymer Processing 32 1 (2017): 58-71. http://dx.doi.org/10.3139/217.3272.
    Published • 10.3139/217.3272
  108. L.L. Ferrás. "Guidelines for balancing the flow in extrusion dies: the influence of the material rheology". Journal of Polymer Engineering (2017):
    doi.org/10.1515/polyeng-2016-0449
  109. L.L. Ferrás; Afonso, A. M.; Nóbrega, J. M.; Pinho, F. T.. "A numerical and theoretical study on viscoelastic fluid slip flows". Physics of Fluids 29 5 (2017): 053102. http://dx.doi.org/10.1063/1.4983062.
    Published • doi.org/10.1063/1.4983062
  110. L.L. Ferrás; Morgado, Maria Luísa; Rebelo, Magda; Ford, Neville J.. "Numerical solution for diffusion equations with distributed order in time using a Chebyshev collocation method". Applied Numerical Mathematics 114 (2017): 108-123. http://dx.doi.org/10.1016/j.apnum.2016.11.001.
    Published • doi.org/10.1016/j.apnum.2016.11.001
  111. L.L. Ferrás. "Design guidelines to balance the flow distribution in complex profile extrusion dies". International Polymer Processing (2017):
    doi.org/10.3139/217.3272
  112. L.L. Ferrás. "Improved Both Sides Diffusion (iBSD): a new and straightforward stabilization approach for viscoelastic fluid flows". Journal of Non-Newtonian Fluid Mechanics (2017):
    doi.org/10.1016/j.jnnfm.2017.09.008
  113. Rajkumar, A.; Ferrás, Luís Jorge Lima; Fernandes, C.; Carneiro, O. S.; Becker, M.; Nóbrega, J. M.. "Design guidelines to balance the flow distribution in complex profile extrusion dies". (2017): http://hdl.handle.net/1822/47549.
    10.3139/217.3272
  114. Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Pinho, F. T.. "A numerical and theoretical study on viscoelastic fluid slip flows". (2017): http://hdl.handle.net/1822/53298.
    10.1063/1.4983062
  115. Khaliq, Muhammad Hussam; Gomes, Rui; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.; Ferrás, Luís Jorge Lima. "On the use of high viscosity polymers in the fused filament fabrication process". (2017): http://hdl.handle.net/1822/47547.
    10.1108/RPJ-02-2016-0027
  116. Fernandes, Célio Bruno Pinto; Araujo, M. S. B.; Ferrás, Luís Jorge Lima; Miguel Nóbrega, J.. "Improved both sides diffusion (iBSD): A new and straightforward stabilization approach for viscoelastic fluid flows". (2017): http://hdl.handle.net/1822/49991.
    10.1016/j.jnnfm.2017.09.008
  117. Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Pinho, F. T.. "A numerical and theoretical study on viscoelastic fluid slip flows". (2017): http://hdl.handle.net/1822/53298.
    10.1063/1.4983062
  118. Rajkumar, A.; Ferrás, Luís Jorge Lima; Fernandes, C.; Carneiro, O. S.; Becker, M.; Nóbrega, J. M.. "Design guidelines to balance the flow distribution in complex profile extrusion dies". (2017): http://hdl.handle.net/1822/47549.
    10.3139/217.3272
  119. Khaliq, Muhammad Hussam; Gomes, Rui; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.; Ferrás, Luís Jorge Lima. "On the use of high viscosity polymers in the fused filament fabrication process". (2017): http://hdl.handle.net/1822/47547.
    10.1108/RPJ-02-2016-0027
  120. Fernandes, Célio Bruno Pinto; Araujo, M. S. B.; Ferrás, Luís Jorge Lima; Miguel Nóbrega, J.. "Improved both sides diffusion (iBSD): A new and straightforward stabilization approach for viscoelastic fluid flows". (2017): http://hdl.handle.net/1822/49991.
    10.1016/j.jnnfm.2017.09.008
  121. Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Pinho, F. T.. "A numerical and theoretical study on viscoelastic fluid slip flows". (2017): http://hdl.handle.net/1822/53298.
    10.1063/1.4983062
  122. Rajkumar, A.; Ferrás, Luís Jorge Lima; Fernandes, C.; Carneiro, O. S.; Becker, M.; Nóbrega, J. M.. "Design guidelines to balance the flow distribution in complex profile extrusion dies". (2017): http://hdl.handle.net/1822/47549.
    10.3139/217.3272
  123. Fernandes, Célio Bruno Pinto; Araujo, M. S. B.; Ferrás, Luís Jorge Lima; Miguel Nóbrega, J.. "Improved both sides diffusion (iBSD): A new and straightforward stabilization approach for viscoelastic fluid flows". (2017): http://hdl.handle.net/1822/49991.
    10.1016/j.jnnfm.2017.09.008
  124. Khaliq, Muhammad Hussam; Gomes, Rui; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.; Carneiro, O. S.; Ferrás, Luís Jorge Lima. "On the use of high viscosity polymers in the fused filament fabrication process". (2017): http://hdl.handle.net/1822/47547.
    10.1108/RPJ-02-2016-0027
  125. L.L. Ferrás; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Electro-osmotic and pressure-driven flow of viscoelastic fluids in microchannels: Analytical and semi-analytical solutions". Physics of Fluids 28 9 (2016): 093102. http://dx.doi.org/10.1063/1.4962357.
    Published • 10.1063/1.4962357
  126. L.L. Ferrás; Habla, Florian; Fernandes, C.; Maier, Maximilian; Densky, Lennart; Rajkumar, Ananth; Carneiro, O.S.; Hinrichsen, Olaf; Nóbrega, J. Miguel. "Development and validation of a model for the temperature distribution in the extrusion calibration stage". Applied Thermal Engineering 100 (2016): 538-552. http://dx.doi.org/10.1016/j.applthermaleng.2016.01.166.
    Published • doi.org/10.1016
  127. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Electro-osmotic and pressure-driven flow of viscoelastic fluids in microchannels: analytical and semi-analytical solutions". (2016): http://hdl.handle.net/1822/53189.
    10.1063/1.4962357
  128. Habla, Florian; Fernandes, C.; Maier, Maximilian; Densky, Lennart; Ferrás, Luís Jorge Lima; Rajkumar, Ananth; Carneiro, O. S.; Hinrichsen, Olaf; Nóbrega, J. M.. "Development and validation of a model for the temperature distribution in the extrusion calibration stage". (2016): http://hdl.handle.net/1822/47545.
    10.1016/j.applthermaleng.2016.01.166
  129. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Electro-osmotic and pressure-driven flow of viscoelastic fluids in microchannels: analytical and semi-analytical solutions". (2016): http://hdl.handle.net/1822/53189.
    10.1063/1.4962357
  130. Habla, Florian; Fernandes, C.; Maier, Maximilian; Densky, Lennart; Ferrás, Luís Jorge Lima; Rajkumar, Ananth; Carneiro, O. S.; Hinrichsen, Olaf; Nóbrega, J. M.. "Development and validation of a model for the temperature distribution in the extrusion calibration stage". (2016): http://hdl.handle.net/1822/47545.
    10.1016/j.applthermaleng.2016.01.166
  131. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Electro-osmotic and pressure-driven flow of viscoelastic fluids in microchannels: analytical and semi-analytical solutions". (2016): http://hdl.handle.net/1822/53189.
    10.1063/1.4962357
  132. Habla, Florian; Fernandes, C.; Maier, Maximilian; Densky, Lennart; Ferrás, Luís Jorge Lima; Rajkumar, Ananth; Carneiro, O. S.; Hinrichsen, Olaf; Nóbrega, J. M.. "Development and validation of a model for the temperature distribution in the extrusion calibration stage". (2016): http://hdl.handle.net/1822/47545.
    10.1016/j.applthermaleng.2016.01.166
  133. Gonçalves, N. D.; Pereira, S. P.; L.L. Ferrás; Nóbrega, J. M.; Carneiro, O. S.. "Using the GPU to Design Complex Profile Extrusion Dies". International Polymer Processing 30 4 (2015): 442-450. http://dx.doi.org/10.3139/217.2957.
    Published • 10.3139/217.2957
  134. L.L. Ferrás; Ford, Neville J.; Morgado, Maria L.; Nóbrega, João M.; Rebelo, Magda S.. "Fractional Pennes’ Bioheat Equation: Theoretical and Numerical Studies". Fractional Calculus and Applied Analysis 18 4 (2015): http://dx.doi.org/10.1515/fca-2015-0062.
    Published • 10.1515/fca-2015-0062
  135. Gonçalves, N. D.; Pereira, S. P.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Carneiro, O. S.. "Using the GPU to design complex profile extrusion dies". (2015): http://hdl.handle.net/1822/38704.
    10.3139/217.2957
  136. Gonçalves, Nelson Daniel Ferreira; Teixeira, P.; Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Carneiro, O. S.. "Design and optimization of an extrusion die for the production of wood–plastic composite profiles". (2015): http://hdl.handle.net/1822/38706.
    10.1002/pen.24024
  137. Ferrás, Luís L.; Ford, Neville J.; Morgado, M. Luísa; Nóbrega, João M.; Rebelo, Magda. "Fractional Pennes Bioheat Equation: Theoretical and Numerical Studies". (2015): http://hdl.handle.net/10348/6727.
  138. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M. S.. "Fractional pennes' bioheat equation: theoretical and numerical studies". (2015): http://hdl.handle.net/1822/38378.
    10.1515/fca-2015-0062
  139. Gonçalves, N. D.; Pereira, S. P.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Carneiro, O. S.. "Using the GPU to design complex profile extrusion dies". (2015): http://hdl.handle.net/1822/38704.
    10.3139/217.2957
  140. Gonçalves, Nelson Daniel Ferreira; Teixeira, P.; Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Carneiro, O. S.. "Design and optimization of an extrusion die for the production of wood–plastic composite profiles". (2015): http://hdl.handle.net/1822/38706.
    10.1002/pen.24024
  141. Ferrás, Luís L.; Ford, Neville J.; Morgado, M. Luísa; Nóbrega, João M.; Rebelo, Magda. "Fractional Pennes Bioheat Equation: Theoretical and Numerical Studies". (2015): http://hdl.handle.net/10348/6727.
  142. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M. S.. "Fractional pennes' bioheat equation: theoretical and numerical studies". (2015): http://hdl.handle.net/1822/38378.
    10.1515/fca-2015-0062
  143. Gonçalves, N. D.; Pereira, S. P.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Carneiro, O. S.. "Using the GPU to design complex profile extrusion dies". (2015): http://hdl.handle.net/1822/38704.
    10.3139/217.2957
  144. Ferrás, Luís L.; Ford, Neville J.; Morgado, M. Luísa; Nóbrega, João M.; Rebelo, Magda. "Fractional Pennes Bioheat Equation: Theoretical and Numerical Studies". (2015): http://hdl.handle.net/10348/6727.
  145. Gonçalves, Nelson Daniel Ferreira; Teixeira, P.; Ferrás, Luís Jorge Lima; Afonso, A. M.; Nóbrega, J. M.; Carneiro, O. S.. "Design and optimization of an extrusion die for the production of wood–plastic composite profiles". (2015): http://hdl.handle.net/1822/38706.
    10.1002/pen.24024
  146. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M. S.. "Fractional pennes' bioheat equation: theoretical and numerical studies". (2015): http://hdl.handle.net/1822/38378.
    10.1515/fca-2015-0062
  147. L.L. Ferrás; Afonso, A.M.; Alves, M.A.; Nóbrega, J.M.; Carneiro, O.S.; Pinho, F.T.. "Slip flows of Newtonian and viscoelastic fluids in a 4:1 contraction". Journal of Non-Newtonian Fluid Mechanics 214 (2014): 28-37. http://dx.doi.org/10.1016/j.jnnfm.2014.09.007.
    Published • 10.1016/j.jnnfm.2014.09.007
  148. Gonçalves, N.D.; Teixeira, P.; Afonso, A.M.; Nóbrega, J.M.; Carneiro, O.S.; L.L. Ferrás. "Design and optimization of an extrusion die for the production of wood-plastic composite profiles". Polymer Engineering & Science 55 8 (2014): 1849-1855. http://dx.doi.org/10.1002/pen.24024.
    Published • 10.1002/pen.24024
  149. L.L. Ferrás; Afonso, A.M.; Alves, M.A.; Nóbrega, J.M.; Pinho, F.T.. "Analytical and numerical study of the electro-osmotic annular flow of viscoelastic fluids". Journal of Colloid and Interface Science 420 (2014): 152-157. http://dx.doi.org/10.1016/j.jcis.2013.12.043.
    Published • 10.1016/j.jcis.2013.12.043
  150. Ferrás, L. L.; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Annular flow of viscoelastic fluids: Analytical and numerical solutions". Journal of Non-Newtonian Fluid Mechanics 212 0 (2014): 80-91.
    http://dx.doi.org/10.1016/j.jnnfm.2014.07.004
  151. L.L. Ferrás. "Design and optimization of an extrusion die for the production of wood--plastic composite profiles". Polymer Engineering & Science (2014):
    DOI: 10.1002/pen.24024
  152. Afonso, A. M.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Alves, M. A.; Pinho, F. T.. "Pressure-driven electrokinetic slip flows of viscoelastic fluids in hydrophobic microchannels". (2014): http://hdl.handle.net/1822/26793.
    10.1007/s10404-013-1279-5
  153. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. "Slip flows of Newtonian and viscoelastic fluids in a 4:1 contraction". (2014): http://hdl.handle.net/1822/38379.
    10.1016/j.jnnfm.2014.09.007
  154. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Analytical and numerical study of the electro-osmotic annular flow of viscoelastic fluids". (2014): http://hdl.handle.net/1822/39252.
    10.1016/j.jcis.2013.12.043
  155. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Annular flow of viscoelastic fluids: Analytical and numerical solutions". (2014): http://hdl.handle.net/1822/39255.
    10.1016/j.jnnfm.2014.07.004
  156. Afonso, A. M.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Alves, M. A.; Pinho, F. T.. "Pressure-driven electrokinetic slip flows of viscoelastic fluids in hydrophobic microchannels". (2014): http://hdl.handle.net/1822/26793.
    10.1007/s10404-013-1279-5
  157. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Annular flow of viscoelastic fluids: Analytical and numerical solutions". (2014): http://hdl.handle.net/1822/39255.
    10.1016/j.jnnfm.2014.07.004
  158. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. "Slip flows of Newtonian and viscoelastic fluids in a 4:1 contraction". (2014): http://hdl.handle.net/1822/38379.
    10.1016/j.jnnfm.2014.09.007
  159. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Analytical and numerical study of the electro-osmotic annular flow of viscoelastic fluids". (2014): http://hdl.handle.net/1822/39252.
    10.1016/j.jcis.2013.12.043
  160. Afonso, A. M.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Alves, M. A.; Pinho, F. T.. "Pressure-driven electrokinetic slip flows of viscoelastic fluids in hydrophobic microchannels". (2014): http://hdl.handle.net/1822/26793.
    10.1007/s10404-013-1279-5
  161. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. "Slip flows of Newtonian and viscoelastic fluids in a 4:1 contraction". (2014): http://hdl.handle.net/1822/38379.
    10.1016/j.jnnfm.2014.09.007
  162. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Annular flow of viscoelastic fluids: Analytical and numerical solutions". (2014): http://hdl.handle.net/1822/39255.
    10.1016/j.jnnfm.2014.07.004
  163. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Analytical and numerical study of the electro-osmotic annular flow of viscoelastic fluids". (2014): http://hdl.handle.net/1822/39252.
    10.1016/j.jcis.2013.12.043
  164. Afonso, A. M.; L.L. Ferrás; Nóbrega, J. M.; Alves, M. A.; Pinho, F. T.. "Pressure-driven electrokinetic slip flows of viscoelastic fluids in hydrophobic microchannels". Microfluidics and Nanofluidics 16 6 (2013): 1131-1142. http://dx.doi.org/10.1007/s10404-013-1279-5.
    Published • 10.1007/s10404-013-1279-5
  165. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of slip boundary conditions in the finite volume method : new techniques". (2013): http://hdl.handle.net/1822/26758.
    10.1002/fld.3765
  166. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of slip boundary conditions in the finite volume method : new techniques". (2013): http://hdl.handle.net/1822/26758.
    10.1002/fld.3765
  167. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Implementation of slip boundary conditions in the finite volume method : new techniques". (2013): http://hdl.handle.net/1822/26758.
    10.1002/fld.3765
  168. L.L. Ferrás; Nóbrega, J.M.; Pinho, F.T.. "Implementation of slip boundary conditions in the finite volume method: new techniques". International Journal for Numerical Methods in Fluids 72 7 (2012): 724-747. http://dx.doi.org/10.1002/fld.3765.
    Published • 10.1002/fld.3765
  169. L.L. Ferrás; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Development Length in Planar Channel Flows of Newtonian Fluids Under the Influence of Wall Slip". Journal of Fluids Engineering 134 10 (2012): http://dx.doi.org/10.1115/1.4007383.
    Published • 10.1115/1.4007383
  170. Ferras, L. L.; Nobrega, J. M.; Pinho, F. T.. "Analytical solutions for Newtonian and inelastic non-Newtonian flows with wall slip". Journal of Non-Newtonian Fluid Mechanics 175 (2012): 76-88.
    10.1016/j.jnnfm.2012.03.004
  171. Ferras, L. L.; Nobrega, J. M.; Pinho, F. T.. "Analytical solutions for channel flows of Phan-Thien-Tanner and Giesekus fluids under slip". Journal of Non-Newtonian Fluid Mechanics 171 (2012): 97-105.
    10.1016/j.jnnfm.2012.01.009
  172. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Development length in planar channel flows of newtonian fluids under the influence of wall slip". (2012): http://hdl.handle.net/1822/26755.
    10.1115/1.4007383
  173. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for newtonian and inelastic non-newtonian flows with wall slip". (2012): http://hdl.handle.net/1822/26757.
    10.1016/j.jnnfm.2012.03.004
  174. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for channel flows of Phan-Thien–Tanner and Giesekus fluids under slip". (2012): http://hdl.handle.net/1822/26520.
    10.1016/j.jnnfm.2012.01.009
  175. Luís L. Ferrás; João M.Nóbrega; Fernando T. Pinho. "Analytical solutions for channel flows of Phan-Thien-Tanner and Giesekus fluids under slip". (2012): https://hdl.handle.net/10216/106122.
    10.1016/j.jnnfm.2012.01.009
  176. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Development length in planar channel flows of newtonian fluids under the influence of wall slip". (2012): http://hdl.handle.net/1822/26755.
    10.1115/1.4007383
  177. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for newtonian and inelastic non-newtonian flows with wall slip". (2012): http://hdl.handle.net/1822/26757.
    10.1016/j.jnnfm.2012.03.004
  178. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for channel flows of Phan-Thien–Tanner and Giesekus fluids under slip". (2012): http://hdl.handle.net/1822/26520.
    10.1016/j.jnnfm.2012.01.009
  179. Luís L. Ferrás; João M.Nóbrega; Fernando T. Pinho. "Analytical solutions for channel flows of Phan-Thien-Tanner and Giesekus fluids under slip". (2012): https://hdl.handle.net/10216/106122.
    10.1016/j.jnnfm.2012.01.009
  180. Ferrás, Luís Jorge Lima; Afonso, A. M.; Alves, M. A.; Nóbrega, J. M.; Pinho, F. T.. "Development length in planar channel flows of newtonian fluids under the influence of wall slip". (2012): http://hdl.handle.net/1822/26755.
    10.1115/1.4007383
  181. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for newtonian and inelastic non-newtonian flows with wall slip". (2012): http://hdl.handle.net/1822/26757.
    10.1016/j.jnnfm.2012.03.004
  182. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.. "Analytical solutions for channel flows of Phan-Thien–Tanner and Giesekus fluids under slip". (2012): http://hdl.handle.net/1822/26520.
    10.1016/j.jnnfm.2012.01.009
  183. Luís L. Ferrás; João M.Nóbrega; Fernando T. Pinho. "Analytical solutions for channel flows of Phan-Thien-Tanner and Giesekus fluids under slip". (2012): https://hdl.handle.net/10216/106122.
    10.1016/j.jnnfm.2012.01.009
Magazine article
  1. Ferrás, Luís; Y. Sitotaw; C. Fernandes; J. Miguel; O.S. Carneiro. "Novel indicator of weld line strength in extruded parts", SPE online, 2017, https://www.researchgate.net/publication/319826863_Novel_indicator_of_weld_line_strength_in_extruded_parts.
    10.2417/spepro.006931
  2. N. Gonçalves; P.F. Teixeira; L.L. Ferrás; A.M. Afonso. "Innovative approach to the design of profile extrusion dies", SPE online, 2015, https://www.researchgate.net/publication/319826600_Innovative_approach_to_the_design_of_profile_extrusion_dies.
    10.2417/spepro.005733
Online resource
  1. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. Damped Harmonic Oscillator Dataset. 2023. https://www.kaggle.com/ds/3147798.
  2. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. Synthetic Chemical Reaction Dataset. 2023. https://www.kaggle.com/ds/3010478.
  3. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás. World Population Growth Dataset. 2023. https://www.kaggle.com/ds/3010437.
  4. L.L. Ferrás. Analytical solutions for Newtonian and inelastic non-Newtonian flows with wall slip. 2013. https://www.youtube.com/watch?v=KN0qnGYuXVs.
    10.1016/j.jnnfm.2012.03.004
Preprint
  1. C. Coelho; Costa, M. Fernanda P. ; L.L. Ferrás; Coelho, C.; Costa, M.P.F.; Ferrás, L.L.. "Neural Chronos ODE: Unveiling Temporal Patterns and Forecasting Future and Past Trends in Time Series Data". 2023. https://arxiv.org/abs/2307.01023.
  2. Ribau, AM; Ferrás, LL; Morgado, ML; Rebelo, M; Pinho, FT; Afonso, AM. "Analytical study of the annular flow of a generalised Phan-Thien-Tanner fluid". 2023. https://www.authenticus.pt/P-00Z-FQ3.
    10.1007/s00707-023-03784-z
Thesis / Dissertation
  1. Silva, Diogo Vicente Magalhães Vilela. "Extração de informação de vídeo e técnicas de redes neuronais para deteção de objectos no contexto da monitorização de espaços industriais". Master, 2023. https://hdl.handle.net/1822/85089.
  2. Silva, Diogo Vicente Magalhães Vilela. "Extração de informação de vídeo e técnicas de redes neuronais para deteção de objectos no contexto da monitorização de espaços industriais". Master, 2023. https://hdl.handle.net/1822/85089.
  3. Silva, Diogo Vicente Magalhães Vilela. "Extração de informação de vídeo e técnicas de redes neuronais para deteção de objectos no contexto da monitorização de espaços industriais". Master, 2023. https://hdl.handle.net/1822/85089.
  4. Macedo, Luís Rafael Ferrás. "Os impactos da assimetria de informação no spread bancário". Master, 2022. http://hdl.handle.net/10400.22/21656.
  5. Macedo, Luís Rafael Ferrás. "Os impactos da assimetria de informação no spread bancário". Master, 2022. http://hdl.handle.net/10400.22/21656.
  6. Macedo, Luís Rafael Ferrás. "Os impactos da assimetria de informação no spread bancário". Master, 2022. http://hdl.handle.net/10400.22/21656.
  7. Albuquerque, Luís Miguel Amorim. "Melhoramento do estacionamento público". Master, 2021. https://hdl.handle.net/1822/80682.
  8. Albuquerque, Luís Miguel Amorim. "Melhoramento do estacionamento público". Master, 2021. https://hdl.handle.net/1822/80682.
  9. Albuquerque, Luís Miguel Amorim. "Melhoramento do estacionamento público". Master, 2021. https://hdl.handle.net/1822/80682.
  10. Martins, Cecília Eduarda Coelho Machado da Cruz. "Machine learning and image processing". Master, 2020. http://hdl.handle.net/1822/73671.
  11. Martins, Cecília Eduarda Coelho Machado da Cruz. "Machine learning and image processing". Master, 2020. http://hdl.handle.net/1822/73671.
  12. Martins, Cecília Eduarda Coelho Machado da Cruz. "Machine learning and image processing". Master, 2020. http://hdl.handle.net/1822/73671.
  13. L.L. Ferrás. "Numerical Solution of Fractional Differential Equations and their Application to Physics and Engineering". PhD, University of Chester Faculty of Science and Engineering, 2019. https://chesterrep.openrepository.com/handle/10034/621788.
  14. Mendes, Jorge Manuel Ferraz Soares. "Caracterização reológica de compostos de borracha para aplicação em pisos de pneu". Master, 2017. http://hdl.handle.net/1822/54901.
  15. Manuel Luís Ferrás Ribeiro. "Relatório de Estágio Profissional - "Aprender para ensinar: sinopse de um percurso de preparação profissional em Educação Física"". Master, 2017. https://hdl.handle.net/10216/106234.
  16. Silva, Luís Fernando de Madureira Ferrás da. "O treino funcional no desenvolvimento da aptidão física dos alunos do ensino básico e secundário". Master, 2017. http://hdl.handle.net/10348/7971.
  17. Mendes, Jorge Manuel Ferraz Soares. "Caracterização reológica de compostos de borracha para aplicação em pisos de pneu". Master, 2017. http://hdl.handle.net/1822/54901.
  18. Silva, Luís Fernando de Madureira Ferrás da. "O treino funcional no desenvolvimento da aptidão física dos alunos do ensino básico e secundário". Master, 2017. http://hdl.handle.net/10348/7971.
  19. Manuel Luís Ferrás Ribeiro. "Relatório de Estágio Profissional - "Aprender para ensinar: sinopse de um percurso de preparação profissional em Educação Física"". Master, 2017. https://hdl.handle.net/10216/106234.
  20. Mendes, Jorge Manuel Ferraz Soares. "Caracterização reológica de compostos de borracha para aplicação em pisos de pneu". Master, 2017. http://hdl.handle.net/1822/54901.
  21. Manuel Luís Ferrás Ribeiro. "Relatório de Estágio Profissional - "Aprender para ensinar: sinopse de um percurso de preparação profissional em Educação Física"". Master, 2017. https://hdl.handle.net/10216/106234.
  22. Silva, Luís Fernando de Madureira Ferrás da. "O treino funcional no desenvolvimento da aptidão física dos alunos do ensino básico e secundário". Master, 2017. http://hdl.handle.net/10348/7971.
  23. Magalhães, Ana Cláudia Leite. "OpenFOAM® simulation of the injection moulding filling stage". Master, 2016. http://hdl.handle.net/1822/65291.
  24. Magalhães, Ana Cláudia Leite. "OpenFOAM® simulation of the injection moulding filling stage". Master, 2016. http://hdl.handle.net/1822/65291.
  25. Magalhães, Ana Cláudia Leite. "OpenFOAM® simulation of the injection moulding filling stage". Master, 2016. http://hdl.handle.net/1822/65291.
  26. Khaliq, Muhammad Hussam. "Key features of materials for the fused deposition modelling process". Master, 2015. http://hdl.handle.net/1822/36884.
  27. Khaliq, Muhammad Hussam. "Key features of materials for the fused deposition modelling process". Master, 2015. http://hdl.handle.net/1822/36884.
  28. Khaliq, Muhammad Hussam. "Key features of materials for the fused deposition modelling process". Master, 2015. http://hdl.handle.net/1822/36884.
  29. Luís, Vânia Sofia Ferrás. "Embalagens Flexíveis: estudo do processo de reticulação de adesivos e do coeficiente de atrito". Master, 2013. http://hdl.handle.net/10400.22/7148.
  30. Luís, Vânia Sofia Ferrás. "Embalagens Flexíveis: estudo do processo de reticulação de adesivos e do coeficiente de atrito". Master, 2013. http://hdl.handle.net/10400.22/7148.
  31. Luís, Vânia Sofia Ferrás. "Embalagens Flexíveis: estudo do processo de reticulação de adesivos e do coeficiente de atrito". Master, 2013. http://hdl.handle.net/10400.22/7148.
  32. L.L. Ferrás. "Theoretical and numerical studies of slip flows". PhD, Universidade do Minho - Campus de Azurém, 2012. https://www.researchgate.net/publication/320183189_Theoretical_and_numerical_studies_of_slip_flows_PhD.
  33. Silva, Luís Fernando de Madureira Ferrás da. "Escola de inclusão vs sociedade integradora". Master, 2012. http://hdl.handle.net/10400.26/2600.
  34. Ferreira, João Luís Ferrás. "Análise de estabilidade de taludes pelos métodos de Janbu e Spencer". Master, 2012. http://hdl.handle.net/10216/64689.
  35. Ferrás, Luís Jorge Lima. "Theoretical and numerical studies of slip flows". PhD, 2012. http://hdl.handle.net/1822/22933.
  36. Silva, Luís Fernando de Madureira Ferrás da. "Escola de inclusão vs sociedade integradora". Master, 2012. http://hdl.handle.net/10400.26/2600.
  37. Ferreira, João Luís Ferrás. "Análise de estabilidade de taludes pelos métodos de Janbu e Spencer". Master, 2012. http://hdl.handle.net/10216/64689.
  38. Ferrás, Luís Jorge Lima. "Theoretical and numerical studies of slip flows". PhD, 2012. http://hdl.handle.net/1822/22933.
  39. Silva, Luís Fernando de Madureira Ferrás da. "Escola de inclusão vs sociedade integradora". Master, 2012. http://hdl.handle.net/10400.26/2600.
  40. Ferreira, João Luís Ferrás. "Análise de estabilidade de taludes pelos métodos de Janbu e Spencer". Master, 2012. http://hdl.handle.net/10216/64689.
  41. Ferrás, Luís Jorge Lima. "Theoretical and numerical studies of slip flows". PhD, 2012. http://hdl.handle.net/1822/22933.
  42. L.L. Ferrás. "Condições fronteira nas interfaces - Descontinuidade no campo de velocidades (Master Thesis) - in Portuguese". Master, Universidade do Porto, 2007. https://www.researchgate.net/publication/320183414_Condicoes_fronteira_nas_interfaces_-_Descontinuidade_no_campo_de_velocidades_Master_Thesis_-_in_Portuguese.

Other

Other output
  1. Enhancing Continuous Time Series Modelling with a Latent ODE-LSTM Approach. 2023. Coelho, C.; Costa, M.P.F.; Ferrás, L.L.. http://www.scopus.com/inward/record.url?eid=2-s2.0-85168085178&partnerID=MN8TOARS.
  2. Prior knowledge meets neural odes: a two stage training method for improved explainability. Neural Ordinary Differential Equations (ODEs) have been used extensively to model physical systems because they represent a continuous-time function that can make predictions over the entire time domain. However, most of the time, the parameters of these physical systems are subject to strict laws/constraints. But there is no guarantee that the Neural ODE model satisfies these constraints. Therefo. 2023. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima. https://hdl.handle.net/1822/87937.
  3. Prior knowledge meets neural odes: a two stage training method for improved explainability. Neural Ordinary Differential Equations (ODEs) have been used extensively to model physical systems because they represent a continuous-time function that can make predictions over the entire time domain. However, most of the time, the parameters of these physical systems are subject to strict laws/constraints. But there is no guarantee that the Neural ODE model satisfies these constraints. Therefo. 2023. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima. https://hdl.handle.net/1822/87937.
  4. Prior knowledge meets neural odes: a two stage training method for improved explainability. Neural Ordinary Differential Equations (ODEs) have been used extensively to model physical systems because they represent a continuous-time function that can make predictions over the entire time domain. However, most of the time, the parameters of these physical systems are subject to strict laws/constraints. But there is no guarantee that the Neural ODE model satisfies these constraints. Therefo. 2023. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima. https://hdl.handle.net/1822/87937.
  5. A Comparison between the Extended and the Generalised Phan-Thien and Tanner Constitutive Differential Equations. 2022. Ferrás, L.L.; Afonso, A.M.. http://www.scopus.com/inward/record.url?eid=2-s2.0-85135961056&partnerID=MN8TOARS.
    10.2139/ssrn.4182098
  6. Advanced polymer simulation and processing. [Excerpt] Polymer processing techniques are of paramount importance in the manufacture of polymer parts. The key focus is on producing parts with the desired quality, which usually refers to mechanical performance, dimensional conformity, and appearance. To maximize the overall efficiency of polymer processing techniques, advanced modeling codes are needed along with experimental setups to simulat. 2022. Fernandes, C.; Faroughi, S.A.; Ferrás, Luís Jorge Lima; Afonso, Alexandre Miguel Prior. https://hdl.handle.net/1822/78666.
    10.3390/polym14122480
  7. Advanced polymer simulation and processing. [Excerpt] Polymer processing techniques are of paramount importance in the manufacture of polymer parts. The key focus is on producing parts with the desired quality, which usually refers to mechanical performance, dimensional conformity, and appearance. To maximize the overall efficiency of polymer processing techniques, advanced modeling codes are needed along with experimental setups to simulat. 2022. Fernandes, C.; Faroughi, S.A.; Ferrás, Luís Jorge Lima; Afonso, Alexandre Miguel Prior. https://hdl.handle.net/1822/78666.
    10.3390/polym14122480
  8. Advanced polymer simulation and processing. [Excerpt] Polymer processing techniques are of paramount importance in the manufacture of polymer parts. The key focus is on producing parts with the desired quality, which usually refers to mechanical performance, dimensional conformity, and appearance. To maximize the overall efficiency of polymer processing techniques, advanced modeling codes are needed along with experimental setups to simulat. 2022. Fernandes, C.; Faroughi, S.A.; Ferrás, Luís Jorge Lima; Afonso, Alexandre Miguel Prior. https://hdl.handle.net/1822/78666.
    10.3390/polym14122480
  9. Development of a machine learning model and a user interface to detect illegal swimming pools. Portuguese legislation states the compulsory reporting of the addition of amenities, such as swimming pools, to the Portuguese tax authority. The purpose is to update the property tax value, to be charged annually to the owner of each real estate. According to MarketWatch, this decade will bring a global rise to the number of swimming pools due to certain factors such as: cost reduction, increasin. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. https://hdl.handle.net/1822/75102.
  10. A numerical method for the transient couette flow of a distributed-order viscoelastic fluid. This work presents a numerical method for the solution of two coupled distributed-order fractional differential equations, that appear in the pure tangential flow of fluids modelled by the Distributed-Order Viscoelastic Model. We prove the solvability of the method, and, perform numerical simulations of relaxation tests.. Supported by FCT - Fundacao para a Ciencia e a Tecnologia, through projects:. 2021. Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/75250.
    10.1007/978-3-030-86973-1_29
  11. A distributed order viscoelastic model for small deformations. In this work we discuss the connection between classical, fractional and dis- tributed order viscoelastic Maxwell models, presenting the basic theory supporting these constitutive equations, and establishing some background on the admissibility of the dis- tributed order Maxwell model. We derive the storage and loss modulus functions for the distributed order viscoelastic model and perform a fitti. 2021. Ferrás, Luís Jorge Lima; Morgado, Maria Luísa; Rebelo, Magda. http://hdl.handle.net/1822/75101.
  12. Object detection with RetinaNet on aerial imagery: the Algarve landscape. This work presents a study of the different existing object detection algorithms and the implementation of a Deep Learning model capable of detecting swimming pools from satellite images. In order to obtain the best results for this particular task, the RetinaNet algorithm was chosen. The model was trained using a customised dataset from Kaggle and tested with a newly developed dataset containing. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. http://hdl.handle.net/1822/75255.
    10.1007/978-3-030-86960-1_35
  13. Optimisation approach for parameter estimation of the generalised PTT viscoelastic model. The exponential form of the original Phan-Thien and Tanner (PTT) model is often used to study complex viscoelastic fluids. Recently, a generalised version of the PTT model, that uses the Mittag-Leffler function to compute a new function of the trace of the stress tensor, was proposed. This new model adds one or two additional fitting parameters that allow for greater fitting capability. In this pa. 2021. Costa, M. Fernanda P.; Coelho, C.; Ferrás, Luís Jorge Lima. http://hdl.handle.net/1822/75254.
    10.1007/978-3-030-86973-1_34
  14. Development of a machine learning model and a user interface to detect illegal swimming pools. Portuguese legislation states the compulsory reporting of the addition of amenities, such as swimming pools, to the Portuguese tax authority. The purpose is to update the property tax value, to be charged annually to the owner of each real estate. According to MarketWatch, this decade will bring a global rise to the number of swimming pools due to certain factors such as: cost reduction, increasin. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. https://hdl.handle.net/1822/75102.
  15. A numerical method for the transient couette flow of a distributed-order viscoelastic fluid. This work presents a numerical method for the solution of two coupled distributed-order fractional differential equations, that appear in the pure tangential flow of fluids modelled by the Distributed-Order Viscoelastic Model. We prove the solvability of the method, and, perform numerical simulations of relaxation tests.. Supported by FCT - Fundacao para a Ciencia e a Tecnologia, through projects:. 2021. Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/75250.
    10.1007/978-3-030-86973-1_29
  16. A distributed order viscoelastic model for small deformations. In this work we discuss the connection between classical, fractional and dis- tributed order viscoelastic Maxwell models, presenting the basic theory supporting these constitutive equations, and establishing some background on the admissibility of the dis- tributed order Maxwell model. We derive the storage and loss modulus functions for the distributed order viscoelastic model and perform a fitti. 2021. Ferrás, Luís Jorge Lima; Morgado, Maria Luísa; Rebelo, Magda. http://hdl.handle.net/1822/75101.
  17. Optimisation approach for parameter estimation of the generalised PTT viscoelastic model. The exponential form of the original Phan-Thien and Tanner (PTT) model is often used to study complex viscoelastic fluids. Recently, a generalised version of the PTT model, that uses the Mittag-Leffler function to compute a new function of the trace of the stress tensor, was proposed. This new model adds one or two additional fitting parameters that allow for greater fitting capability. In this pa. 2021. Costa, M. Fernanda P.; Coelho, C.; Ferrás, Luís Jorge Lima. http://hdl.handle.net/1822/75254.
    10.1007/978-3-030-86973-1_34
  18. Object detection with RetinaNet on aerial imagery: the Algarve landscape. This work presents a study of the different existing object detection algorithms and the implementation of a Deep Learning model capable of detecting swimming pools from satellite images. In order to obtain the best results for this particular task, the RetinaNet algorithm was chosen. The model was trained using a customised dataset from Kaggle and tested with a newly developed dataset containing. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. http://hdl.handle.net/1822/75255.
    10.1007/978-3-030-86960-1_35
  19. Development of a machine learning model and a user interface to detect illegal swimming pools. Portuguese legislation states the compulsory reporting of the addition of amenities, such as swimming pools, to the Portuguese tax authority. The purpose is to update the property tax value, to be charged annually to the owner of each real estate. According to MarketWatch, this decade will bring a global rise to the number of swimming pools due to certain factors such as: cost reduction, increasin. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. https://hdl.handle.net/1822/75102.
  20. Object detection with RetinaNet on aerial imagery: the Algarve landscape. This work presents a study of the different existing object detection algorithms and the implementation of a Deep Learning model capable of detecting swimming pools from satellite images. In order to obtain the best results for this particular task, the RetinaNet algorithm was chosen. The model was trained using a customised dataset from Kaggle and tested with a newly developed dataset containing. 2021. Coelho, C.; Costa, M. Fernanda P.; Ferrás, Luís Jorge Lima; Soares, A. J.. http://hdl.handle.net/1822/75255.
    10.1007/978-3-030-86960-1_35
  21. A numerical method for the transient couette flow of a distributed-order viscoelastic fluid. This work presents a numerical method for the solution of two coupled distributed-order fractional differential equations, that appear in the pure tangential flow of fluids modelled by the Distributed-Order Viscoelastic Model. We prove the solvability of the method, and, perform numerical simulations of relaxation tests.. Supported by FCT - Fundacao para a Ciencia e a Tecnologia, through projects:. 2021. Ferrás, Luís Jorge Lima; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/75250.
    10.1007/978-3-030-86973-1_29
  22. Optimisation approach for parameter estimation of the generalised PTT viscoelastic model. The exponential form of the original Phan-Thien and Tanner (PTT) model is often used to study complex viscoelastic fluids. Recently, a generalised version of the PTT model, that uses the Mittag-Leffler function to compute a new function of the trace of the stress tensor, was proposed. This new model adds one or two additional fitting parameters that allow for greater fitting capability. In this pa. 2021. Costa, M. Fernanda P.; Coelho, C.; Ferrás, Luís Jorge Lima. http://hdl.handle.net/1822/75254.
    10.1007/978-3-030-86973-1_34
  23. A distributed order viscoelastic model for small deformations. In this work we discuss the connection between classical, fractional and dis- tributed order viscoelastic Maxwell models, presenting the basic theory supporting these constitutive equations, and establishing some background on the admissibility of the dis- tributed order Maxwell model. We derive the storage and loss modulus functions for the distributed order viscoelastic model and perform a fitti. 2021. Ferrás, Luís Jorge Lima; Morgado, Maria Luísa; Rebelo, Magda. http://hdl.handle.net/1822/75101.
  24. A hybrid numerical scheme for fractional-order systems. In this work we present a hybrid numerical scheme for the solution of systems of fractional differential equations arising in several fields of engineering. The numerical scheme can deal with both smooth and non-smooth solutions, and, the idea behind the hybrid method is that of approximating the solution as a linear combination of non-polynomial functions in a region near the singularity, and by. 2019. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/66797.
    10.1007/978-3-319-91334-6_100
  25. Differential heating as a strategy for controlling the flow distribution in profile extrusion dies. This work presents a simple procedure for balancing the flow in extrusion dies. The method consists in using different temperatures on the different sides of the extrusion die surface, in this way altering the local viscosity of the polymer melt, and thus the melt flow distribution. The design methodology follows a numerical trial-and-error procedure (implemented in OpenFOAM (R)), which was assess. 2019. Rajkumar, Ananth; Ferras, Luis L.; Fernandes, C.; Carneiro, O. S.; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/65983.
    10.1007/978-3-319-60846-4_8
  26. Improving the numerical stability of steady-state differential viscoelastic flow solvers in OpenFOAM (R). This work reports the developments made in improving the numerical stability of the viscoelastic solvers available in the open-source finite volume computational library OpenFOAM (R). For this purpose, we modify the usual both-side diffusion (BSD) technique, using a new approach to discretize the explicit diffusion operator. Calculations performed with the new solver, for two benchmark 2D case stu. 2019. Fernandes, C.; Araujo, Manoel S. B.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. http://hdl.handle.net/1822/65982.
    10.1007/978-3-319-60846-4_20
  27. A hybrid numerical scheme for fractional-order systems. In this work we present a hybrid numerical scheme for the solution of systems of fractional differential equations arising in several fields of engineering. The numerical scheme can deal with both smooth and non-smooth solutions, and, the idea behind the hybrid method is that of approximating the solution as a linear combination of non-polynomial functions in a region near the singularity, and by. 2019. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/66797.
    10.1007/978-3-319-91334-6_100
  28. Differential heating as a strategy for controlling the flow distribution in profile extrusion dies. This work presents a simple procedure for balancing the flow in extrusion dies. The method consists in using different temperatures on the different sides of the extrusion die surface, in this way altering the local viscosity of the polymer melt, and thus the melt flow distribution. The design methodology follows a numerical trial-and-error procedure (implemented in OpenFOAM (R)), which was assess. 2019. Rajkumar, Ananth; Ferras, Luis L.; Fernandes, C.; Carneiro, O. S.; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/65983.
    10.1007/978-3-319-60846-4_8
  29. Improving the numerical stability of steady-state differential viscoelastic flow solvers in OpenFOAM (R). This work reports the developments made in improving the numerical stability of the viscoelastic solvers available in the open-source finite volume computational library OpenFOAM (R). For this purpose, we modify the usual both-side diffusion (BSD) technique, using a new approach to discretize the explicit diffusion operator. Calculations performed with the new solver, for two benchmark 2D case stu. 2019. Fernandes, C.; Araujo, Manoel S. B.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. http://hdl.handle.net/1822/65982.
    10.1007/978-3-319-60846-4_20
  30. A hybrid numerical scheme for fractional-order systems. In this work we present a hybrid numerical scheme for the solution of systems of fractional differential equations arising in several fields of engineering. The numerical scheme can deal with both smooth and non-smooth solutions, and, the idea behind the hybrid method is that of approximating the solution as a linear combination of non-polynomial functions in a region near the singularity, and by. 2019. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Rebelo, M.. http://hdl.handle.net/1822/66797.
    10.1007/978-3-319-91334-6_100
  31. Differential heating as a strategy for controlling the flow distribution in profile extrusion dies. This work presents a simple procedure for balancing the flow in extrusion dies. The method consists in using different temperatures on the different sides of the extrusion die surface, in this way altering the local viscosity of the polymer melt, and thus the melt flow distribution. The design methodology follows a numerical trial-and-error procedure (implemented in OpenFOAM (R)), which was assess. 2019. Rajkumar, Ananth; Ferras, Luis L.; Fernandes, C.; Carneiro, O. S.; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/65983.
    10.1007/978-3-319-60846-4_8
  32. Improving the numerical stability of steady-state differential viscoelastic flow solvers in OpenFOAM (R). This work reports the developments made in improving the numerical stability of the viscoelastic solvers available in the open-source finite volume computational library OpenFOAM (R). For this purpose, we modify the usual both-side diffusion (BSD) technique, using a new approach to discretize the explicit diffusion operator. Calculations performed with the new solver, for two benchmark 2D case stu. 2019. Fernandes, C.; Araujo, Manoel S. B.; Ferrás, Luís Jorge Lima; Nóbrega, J. M.. http://hdl.handle.net/1822/65982.
    10.1007/978-3-319-60846-4_20
  33. Computer aided die design: A new open-source methodology. In this work we present a detailed description of how to use open source based computer codes to aid the design of complex profile extrusion dies, aiming to improve its flow distribution. The work encompasses the description of the overall open-source die design methodology, the implementation of the energy conservation equation in an existing OpenFOAM® solver, which will be then capable of simula. 2017. Carneiro, O. S.; Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/47557.
    10.1063/1.4982987
  34. A primer on experimental and computational rheology with fractional viscoelastic constitutive models. This work presents a brief introduction to fractional calculus and its application to some problems in rheology. We present two different viscoelastic models based on fractional derivatives (the Fractional Maxwell Model - FMM and the Fractional Viscoelastic Fluid - FVF) and discuss their reduction to the classical Newtonian and Maxwell fluids. A third model is also studied (an extension of the FMM. 2017. Ferrás, Luís Jorge Lima; Ford, Neville John; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth Huw; Nóbrega, J. M.. https://hdl.handle.net/1822/53078.
    10.1063/1.4982977
  35. How non-integer order derivatives can be useful to rheology. In this work we extend a numerical method developed by the group for the solution of fractional differential equations governing the flow of complex fluids. The method is robust and can now deal with graded meshes in time. The grading can be performed in a semi-automatic way, taking into account the evolution in time of the gradient of stress. We also explore the ability of fractional viscoleastic. 2017. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Lusa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. http://hdl.handle.net/1822/53079.
  36. Development and experimental assessment of a numerical modelling code to aid the design of profile extrusion cooling tools. On the extrusion of thermoplastic profiles, upon the forming stage that takes place in the extrusion die, the profile must be cooled in a metallic calibrator. This stage must be done at a high rate, to assure increased productivity, but avoiding the development of high temperature gradients, in order to minimize the level of induced thermal residual stresses. In this work, we present a new coupled. 2017. Carneiro, O. S.; Rajkumar, A.; Fernandes, C.; Ferrás, Luís Jorge Lima; Habla, F.; Nóbrega, J. M.. http://hdl.handle.net/1822/49261.
    10.1063/1.5008146
  37. Computer aided die design: A new open-source methodology. In this work we present a detailed description of how to use open source based computer codes to aid the design of complex profile extrusion dies, aiming to improve its flow distribution. The work encompasses the description of the overall open-source die design methodology, the implementation of the energy conservation equation in an existing OpenFOAM® solver, which will be then capable of simula. 2017. Carneiro, O. S.; Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/47557.
    10.1063/1.4982987
  38. How non-integer order derivatives can be useful to rheology. In this work we extend a numerical method developed by the group for the solution of fractional differential equations governing the flow of complex fluids. The method is robust and can now deal with graded meshes in time. The grading can be performed in a semi-automatic way, taking into account the evolution in time of the gradient of stress. We also explore the ability of fractional viscoleastic. 2017. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Lusa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. http://hdl.handle.net/1822/53079.
  39. Development and experimental assessment of a numerical modelling code to aid the design of profile extrusion cooling tools. On the extrusion of thermoplastic profiles, upon the forming stage that takes place in the extrusion die, the profile must be cooled in a metallic calibrator. This stage must be done at a high rate, to assure increased productivity, but avoiding the development of high temperature gradients, in order to minimize the level of induced thermal residual stresses. In this work, we present a new coupled. 2017. Carneiro, O. S.; Rajkumar, A.; Fernandes, C.; Ferrás, Luís Jorge Lima; Habla, F.; Nóbrega, J. M.. http://hdl.handle.net/1822/49261.
    10.1063/1.5008146
  40. A primer on experimental and computational rheology with fractional viscoelastic constitutive models. This work presents a brief introduction to fractional calculus and its application to some problems in rheology. We present two different viscoelastic models based on fractional derivatives (the Fractional Maxwell Model - FMM and the Fractional Viscoelastic Fluid - FVF) and discuss their reduction to the classical Newtonian and Maxwell fluids. A third model is also studied (an extension of the FMM. 2017. Ferrás, Luís Jorge Lima; Ford, Neville John; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth Huw; Nóbrega, J. M.. https://hdl.handle.net/1822/53078.
    10.1063/1.4982977
  41. Computer aided die design: A new open-source methodology. In this work we present a detailed description of how to use open source based computer codes to aid the design of complex profile extrusion dies, aiming to improve its flow distribution. The work encompasses the description of the overall open-source die design methodology, the implementation of the energy conservation equation in an existing OpenFOAM® solver, which will be then capable of simula. 2017. Carneiro, O. S.; Rajkumar, Ananth; Ferrás, Luís Jorge Lima; Fernandes, Célio Bruno Pinto; Sacramento, Alberto; Nóbrega, J. M.. http://hdl.handle.net/1822/47557.
    10.1063/1.4982987
  42. A primer on experimental and computational rheology with fractional viscoelastic constitutive models. This work presents a brief introduction to fractional calculus and its application to some problems in rheology. We present two different viscoelastic models based on fractional derivatives (the Fractional Maxwell Model - FMM and the Fractional Viscoelastic Fluid - FVF) and discuss their reduction to the classical Newtonian and Maxwell fluids. A third model is also studied (an extension of the FMM. 2017. Ferrás, Luís Jorge Lima; Ford, Neville John; Morgado, Maria Luisa; Rebelo, Magda; McKinley, Gareth Huw; Nóbrega, J. M.. https://hdl.handle.net/1822/53078.
    10.1063/1.4982977
  43. How non-integer order derivatives can be useful to rheology. In this work we extend a numerical method developed by the group for the solution of fractional differential equations governing the flow of complex fluids. The method is robust and can now deal with graded meshes in time. The grading can be performed in a semi-automatic way, taking into account the evolution in time of the gradient of stress. We also explore the ability of fractional viscoleastic. 2017. Ferrás, Luís Jorge Lima; Ford, Neville J.; Morgado, Maria Lusa; Rebelo, Magda; McKinley, Gareth H.; Nóbrega, J. M.. http://hdl.handle.net/1822/53079.
  44. Development and experimental assessment of a numerical modelling code to aid the design of profile extrusion cooling tools. On the extrusion of thermoplastic profiles, upon the forming stage that takes place in the extrusion die, the profile must be cooled in a metallic calibrator. This stage must be done at a high rate, to assure increased productivity, but avoiding the development of high temperature gradients, in order to minimize the level of induced thermal residual stresses. In this work, we present a new coupled. 2017. Carneiro, O. S.; Rajkumar, A.; Fernandes, C.; Ferrás, Luís Jorge Lima; Habla, F.; Nóbrega, J. M.. http://hdl.handle.net/1822/49261.
    10.1063/1.5008146
  45. Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient. In this work we perform a comparison of two different numerical schemes for the solution of the time-fractional diffusion equation with variable diffusion coefficient and a nonlinear source term. The two methods are the implicit numerical scheme presented in [M.L. Morgado, M. Rebelo, Numerical approximation of distributed order reaction- diffusion equations, Journal of Computational and Applied Ma. 2015. Morgado, M.L.; Ferrás, Luís Jorge Lima; Rebelo, M.. https://hdl.handle.net/1822/39268.
  46. Implementation of integral viscoelastic constitutive models in OpenFOAM® computational library. This work reports the implementation and verification of a new so lver in OpenFOAM® open source computational library, able to cope with integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with analytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES, F. 2015. Araújo, M. S.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. http://hdl.handle.net/1822/39256.
    10.1063/1.4918875
  47. Weld lines in extrusion: Understanding the role of the flow conditions. This work reports the implemen tation and verification of a new so lver in OpenFOAM® open source computational library, able to cope w ith integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with anal ytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES. 2015. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Teixeira, Paulo Francisco; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.. http://hdl.handle.net/1822/39257.
    10.1063/1.4918887
  48. Fractional bioheat equation. In this work we develop a new mathematical model for the Pennes’ bioheat equation assuming a fractional time derivative of single order. A numerical method for the solu- tion of such equations is proposed, and, the suitability of the new model for modelling real physical problems is studied and discussed. COMPETE, FEDER and Fundação para a Ciência e a Tecnologia (the Portuguese Foundation for Scie. 2015. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M.. http://hdl.handle.net/1822/39261.
  49. Implementation of integral viscoelastic constitutive models in OpenFOAM® computational library. This work reports the implementation and verification of a new so lver in OpenFOAM® open source computational library, able to cope with integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with analytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES, F. 2015. Araújo, M. S.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. http://hdl.handle.net/1822/39256.
    10.1063/1.4918875
  50. Weld lines in extrusion: Understanding the role of the flow conditions. This work reports the implemen tation and verification of a new so lver in OpenFOAM® open source computational library, able to cope w ith integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with anal ytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES. 2015. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Teixeira, Paulo Francisco; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.. http://hdl.handle.net/1822/39257.
    10.1063/1.4918887
  51. Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient. In this work we perform a comparison of two different numerical schemes for the solution of the time-fractional diffusion equation with variable diffusion coefficient and a nonlinear source term. The two methods are the implicit numerical scheme presented in [M.L. Morgado, M. Rebelo, Numerical approximation of distributed order reaction- diffusion equations, Journal of Computational and Applied Ma. 2015. Morgado, M.L.; Ferrás, Luís Jorge Lima; Rebelo, M.. https://hdl.handle.net/1822/39268.
  52. Fractional bioheat equation. In this work we develop a new mathematical model for the Pennes’ bioheat equation assuming a fractional time derivative of single order. A numerical method for the solu- tion of such equations is proposed, and, the suitability of the new model for modelling real physical problems is studied and discussed. COMPETE, FEDER and Fundação para a Ciência e a Tecnologia (the Portuguese Foundation for Scie. 2015. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M.. http://hdl.handle.net/1822/39261.
  53. Implementation of integral viscoelastic constitutive models in OpenFOAM® computational library. This work reports the implementation and verification of a new so lver in OpenFOAM® open source computational library, able to cope with integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with analytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES, F. 2015. Araújo, M. S.; Fernandes, Célio Bruno Pinto; Ferrás, Luís Jorge Lima; Tukovic, Z.; Jasak, H.; Nóbrega, J. M.. http://hdl.handle.net/1822/39256.
    10.1063/1.4918875
  54. Weld lines in extrusion: Understanding the role of the flow conditions. This work reports the implemen tation and verification of a new so lver in OpenFOAM® open source computational library, able to cope w ith integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with anal ytical solutions and numerical results obtained with the differential upper-convected Maxwell model. CAPES. 2015. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Teixeira, Paulo Francisco; Fernandes, Célio Bruno Pinto; Nóbrega, J. M.. http://hdl.handle.net/1822/39257.
    10.1063/1.4918887
  55. Fractional bioheat equation. In this work we develop a new mathematical model for the Pennes’ bioheat equation assuming a fractional time derivative of single order. A numerical method for the solu- tion of such equations is proposed, and, the suitability of the new model for modelling real physical problems is studied and discussed. COMPETE, FEDER and Fundação para a Ciência e a Tecnologia (the Portuguese Foundation for Scie. 2015. Ferrás, Luís Jorge Lima; Ford, N. J.; Morgado, M. L.; Nóbrega, J. M.; Rebelo, M.. http://hdl.handle.net/1822/39261.
  56. Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient. In this work we perform a comparison of two different numerical schemes for the solution of the time-fractional diffusion equation with variable diffusion coefficient and a nonlinear source term. The two methods are the implicit numerical scheme presented in [M.L. Morgado, M. Rebelo, Numerical approximation of distributed order reaction- diffusion equations, Journal of Computational and Applied Ma. 2015. Morgado, M.L.; Ferrás, Luís Jorge Lima; Rebelo, M.. https://hdl.handle.net/1822/39268.
  57. Effect of polymer melt wall slip on the flow balance of profile extrusion dies. This work describes the implementation of the wall slip boundary condition in an in-house developed 3D numerical code based on the Finite Volume Method. For this purpose, several phenomenological models relating the velocity and the shear stress at the wall were implemented. This new feature is verified using a simple case study, by comparing the numerical results with those obtained through the c. 2013. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Nóbrega, J. M.. http://hdl.handle.net/1822/66080.
    10.1063/1.4802603
  58. Effect of polymer melt wall slip on the flow balance of profile extrusion dies. This work describes the implementation of the wall slip boundary condition in an in-house developed 3D numerical code based on the Finite Volume Method. For this purpose, several phenomenological models relating the velocity and the shear stress at the wall were implemented. This new feature is verified using a simple case study, by comparing the numerical results with those obtained through the c. 2013. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Nóbrega, J. M.. http://hdl.handle.net/1822/66080.
    10.1063/1.4802603
  59. Effect of polymer melt wall slip on the flow balance of profile extrusion dies. This work describes the implementation of the wall slip boundary condition in an in-house developed 3D numerical code based on the Finite Volume Method. For this purpose, several phenomenological models relating the velocity and the shear stress at the wall were implemented. This new feature is verified using a simple case study, by comparing the numerical results with those obtained through the c. 2013. Carneiro, O. S.; Ferrás, Luís Jorge Lima; Pinho, Fernando T.; Nóbrega, J. M.. http://hdl.handle.net/1822/66080.
    10.1063/1.4802603
  60. On the effect of the wall slip boundary conditon. This work describes the implementation and assessment of the wall slip boundary condition in a 3D numerical modelling code, based on the finite volume method, that is being developed by the research team. Several phenomenological models relating the velocity and the shear stress at the wall were implemented. The capabilities of the new numerical code are illustrated with three case studies where t. 2011. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. http://hdl.handle.net/1822/15480.
  61. On the effect of the wall slip boundary conditon. This work describes the implementation and assessment of the wall slip boundary condition in a 3D numerical modelling code, based on the finite volume method, that is being developed by the research team. Several phenomenological models relating the velocity and the shear stress at the wall were implemented. The capabilities of the new numerical code are illustrated with three case studies where t. 2011. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. http://hdl.handle.net/1822/15480.
  62. On the effect of the wall slip boundary conditon. This work describes the implementation and assessment of the wall slip boundary condition in a 3D numerical modelling code, based on the finite volume method, that is being developed by the research team. Several phenomenological models relating the velocity and the shear stress at the wall were implemented. The capabilities of the new numerical code are illustrated with three case studies where t. 2011. Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Pinho, F. T.; Carneiro, O. S.. http://hdl.handle.net/1822/15480.
Activities

Oral presentation

Presentation title Event name
Host (Event location)
2021/03 A Distributed Order Viscoelastic Model for Small Deformations SYMCOMP 2021 - 5th International Conference on Numerical and Symbolic Computation Developments and Applications
Universidade de Évora (Évora, Portugal)
2020/12 Invited Talk - High-Order Numerical Methods for Fractional Differential Equations
Universidade do Minho (Braga, Portugal)
2020 Invited Talk - L.L. Ferrás, Is Fractional Calculus the ultimate tool to solve all anomalous-diffusion problems?, Departamento de Matemática da Universidade de Coimbra, Portugal, February, 2020.
(Portugal)
2019 Invited Talk - L.L. Ferrás, Fractional Differential Equations: Applications and Numerical Analysis, Department of Mathematics – New University of Lisbon, Portugal, 2019.
(Portugal)
2019 Invited Talk - L.L. Ferrás, Numerical Solution of Fractional Differential Equations and their Application to Physics and Engineering, Department of Mathematics – University of Minho, Braga, Portugal, 2019.
(Portugal)
2019 A. Ribau, L.L. Ferrás, M. Luísa, M. Rebelo, A. Afonso, Generalised Phan-Thien-Tanner fluids: new analytical and numerical studies, IBEREO 2019, Porto, Portugal.
2019 A. Ribau, L.L. Ferrás, M. Luísa, M. Rebelo, A. Afonso, Further Developments on Complex Viscoelastic Flows, DCE 2019, Porto, Portugal
2019 M.L. Morgado, M. Rebelo, L.L. Ferrás, N.J. Ford, Distributed order time-fractional diffusion: a numerical method, Symcomp 2019, Porto, Portugal.
2019 L.L. Ferrás, N.J. Ford, M.L. Morgado, M. Rebelo, High-order methods for Systems of Fractional Ordinary Differential Equations, Symcomp 2019, Porto, Portugal.
2019 A. Ribau, L.L. Ferrás, M.L. Morgado, M. Rebelo, A. Afonso, Slip flows of generalised Phan-Thien-Tanner fluids: analytical and numerical studies, Symcomp 2019, Porto, Portugal.
2019 A. Ribau, L.L. Ferrás, M. Luísa, M. Rebelo, A. Afonso, Analytical and semi-analytical solutions for the Poiseuille-Couette flow of a generalised simplified Phan-Thien-Tanner fluid, Congress on Numerical Methods in Engineering (CMN 2019), Guimarães, Portugal.
2018 L.L. Ferrás, N.J. Ford, M.L. Morgado, M. Rebelo, A Hybrid Numerical Scheme for Fractional-Order Systems. Helix 2018, Guimarães, Portugal.
2017 Invited Talk - L.L. Ferrás, Fractional Calculus and Rheology, Massachusetts Institute of Technology (MIT), Boston, USA, 2017
(Boston, United States)
2017 L.L. Ferrás, Neville John Ford, Maria Luísa Morgado, Magda Rebelo, Gareth McKinley, J.M. Nóbrega, How Non-Integer Order Derivatives Can Be Useful To Rheology, SYMCOMP 2017, 3rd International Conference on Numerical and Symbolic Computation: Developments and Applications.
2017 L.L. Ferrás, Neville John Ford, Maria Luísa Morgado, Magda Rebelo, Gareth Huw McKinley, J.M. Nóbrega, A primer on experimental and computational rheology with fractional viscoelastic constitutive models, Novel Trends in Rheology VII (2017).
2017 O.S. Carneiro; A. Rajkumar, Célio Fernandes; Luís Ferrás, F. Habla; J. Miguel Nóbrega, Development and experimental assessment of a numerical modelling code to aid the design of profile extrusion cooling tools ESAFORM 2017. Dublin, Ireland: April, 2017.
2017 Manoel Araújo; Célio Fernandes; Luís Ferrás; Zeljko Tukovic; Hrvoje Jasak; J. Miguel Nóbrega, A New Integral Viscoelastic Solver In Openfoam, OpenFOAM Workshop, Exeter, UK, 2017.
2017 Célio Fernandes; Florian Habla; Luís Ferrás; Ricardo Simões; Olga Carneiro; J. Miguel Nóbrega, Implementation Of Slip Boundary Conditions In Openfoam, OpenFOAM Workshop, Exeter, UK, 2017.
2016 Invited Talk - L.L. Ferrás, Theoretical and Numerical Aspects of Fractional Modelling, Departamento de Matemática da UTAD, Vila Real, Portugal, 2016.
(Portugal)
2016 O.S. Carneiro; A. Rajkumar, Luís Ferrás, Célio Fernandes, C. Becker, J. Miguel Nóbrega, Flow balancing in profile extrusion dies: a novel simplified methodology XXXII Annual Meeting of the Polymer Processing Society, PPS-32. Lyon, France: July, 2016.
2016 M. Araujo, C. Fernandes, L.L. Ferrás, J.M. Nóbrega, Improvements and Assessment Of The Integral Viscoelastic Solver In Openfoam, OpenFOAM Workshop, Guimarães, Portugal, 2016.
2016 Ananth Rajkumar, Luis Ferrás, Célio Fernandes, Olga Carneiro, Martin Becker, João Miguel Nóbrega, A Surrogate Model to Balance The Flow Distribution In Complex Profile Extrusion Dies, OpenFOAM Workshop, Guimarães, Portugal, 2016.
2016 C. Fernandes, M. Araujo, L.L. Ferrás, J.M. Nóbrega, Improving the Numerical Stability Of Steady-State Differential Viscoelastic Flows, OpenFOAM Workshop, Guimarães, Portugal, 2016.
2015 L.L. Ferrás, N. Ford, M.L. Morgado, M. Rebelo, Spectral methods for distributed-order space Riesz diffusion equations, Fifth International Workshop on Analysis and Numerical Approximation of Singular Problems, Algarve, Portugal, 2015.
2015 M. L. Morgado, L. L. Ferrás and M. Rebelo, Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient, CMMSE 2015, Cadiz, Spain, July, 6-10, 2015.
2015 L. L. Ferrás, N. J. Ford, M. L. Morgado, J. M. Nóbrega and M. Rebelo, Fractional bioheat equation, 15th International Conference on Computational and Mathematical Methods in Science and Engineering, CMMSE 2015, Cadiz, Spain, July, 6-10 , 2015.
2015 O.S. Carneiro, L.L. Ferrás, P. Teixeira, C. Fernandes, J.M. Nóbrega, Weld lines in extrusion: Understanding the role of the flow conditions, Novel Trends in Rheology VI, 2015.
2015 M.S. Araújo, C. Fernandes, L.L. Ferrás, Ž. Tukovic, H. Jasak, J.M. Nóbrega, Implementation of integral viscoelastic constitutive models in OpenFOAM® computational library, Novel Trends in Rheology VI, 2015.
2015 C. Fernandes, L.L. Ferrás, D. Semyonov, J.A. Covas, J.M. Nóbrega, Evaluation of the DPMFoam solver, 10th OpenFOAM Workshop, Michigan, USA, 2015.
2015 L.L. Ferrás, J.A. Covas, J.M. Nóbrega, Flow Distribution in Bifurcations: the role of elasticity, 10th OpenFOAM Workshop, Michigan, USA, 2015.
2015 M.S. Araújo, C. Fernandes, L.L. Ferrás, Ž. Tukovic, H. Jasak, J.M. Nóbrega, Modelling Integral Viscoelastic Flows in OpenFOAM, 10th OpenFOAM Workshop, Michigan, USA, 2015.
2015 C. Fernandes, L.L. Ferrás, J.A. Covas, J.M. Nóbrega, Dispersion of Fillers in Viscoelastic Polymer Matrices using Eulerian-Lagrangian Approaches, 10th OpenFOAM Workshop, Michigan, USA, 2015.
2015 L.L. Ferrás, C. Fernandes, J.A. Covas, J.M. Nóbrega, Dispersion Levels in Polymer Nanocomposites: A Numerical Approach, PPS 31, Jeju, South Korea, 2015.
2015 L.L. Ferrás, D. Semeonov, C. Fernandes, J. M. Nóbrega, J. C. Covas, Improving Mixing Processes with the help of numerical tools, Materiais 2015, Porto, Portugal, 2015.
2015 C. Fernandes, L.L. Ferrás, J.A. Covas, J.M. Nóbrega, Understanding the Dispersion of Fillers in Polymer Matrices, Ibereo 2015, Coimbra, Portugal, 2015.
2014 Invited Talk - L.L. Ferrás, Numerical modeling of complex fluid flows using the Finite Volume Method, Departamento de Matemática da Universidade de Coimbra, Portugal, December, 2014.
(Portugal)
2014 Invited Talk - L.L. Ferrás, Modelagem e simulação de escoamentos complexos utilizando o método dos volumes finitos – o poder dos operadores fracionários, Departamento de Matemática Aplicada da Faculdade de Ciências e Tecnologia (UNESP), Brasil, November 2014.
(Brazil)
2014 L.L. Ferrás, C. Fernandes, O. Pozo, A.M. Afonso, M.A. Alves, J.M. Nóbrega, F.T. Pinho, Development length in channel flows of inelastic fluids described by the Sisko viscosity model, MEFTE 2014, Porto, Portugal, September 2014.
2014 L.L. Ferrás, N.J. Ford, M.L. Morgado, M. Rebelo, “A Numerical Method for the Solution of the Time-Fractional Diffusion Equation”, ICCSA 2014, Guimarães, Portugal, July 2014.
2014 L.L. Ferrás, N.J. Ford, M.L. Morgado, J.M. Nóbrega, M. Rebelo, Fractional modelling of Pennes’ bioheat equation using distributed order differential equations. CMMSE 2014, Almería , Spain, July 2014.
2014 L.L. Ferrás, J.M Nóbrega, J.A. Covas, A Systematic Study on the Dispersion Levels in Polymer Nanocomposites, 9th OpenFOAM Workshop,Zagreb, Croatia, June 2014.
2014 C. Fernandes, L.L. Ferrás, O. Pozzo, J.M. Nóbrega, On the Rheology of Filled Polymeric Systems using CFD-DEM Modelling, 9th OpenFOAM Workshop,Zagreb, Croatia, June 2014.
2014 J.M.Nobrega, A. Rajkumar, C. Fernandes, L.L. Ferrás, F. Habla, O. Hinrichsen, J. Guerrero, O. Carneiro, Using OpenFOAM to Aid the Design of Extrusion Dies for Thermoplastics Profiles, 9th OpenFOAM Workshop,Zagreb, Croatia, June 2014.
2013 Invited Talk - L.L. Ferrás, Simulation of extrusion processes – Modeling With Fractional Differential Calculus, Departamento de Matemática da UTAD, Vila Real, Portugal, 2013.
(Portugal)
2013 Invited Talk - L.L. Ferrás, Theoretical and numerical studies of wall slip flows, Ibereo 2013, Málaga, Spain, September 2013.
(Spain)
2013 L.L. Ferrás, A.M. Afonso, M.A. Alves, J.M. Nóbrega, F.T. Pinho, “Studies on the wall slip boundary condition in viscoelastic flows”, PPS-29 Annual Meeting of the Polymer Processing Society, Nuremberg, Germany, July 2013.
2013 L.L. Ferrás, A.M. Afonso, M.A. Alves, J.M. Nóbrega, F.T. Pinho, “Numerical studies of flows with non-zero slip yield stress”, Ibereo 2013, Málaga, Spain, September 2013.
2013 O.S. Carneiro, L.L. Ferrás, F.T. Pinho, J.M. Nóbrega, Effect of polymer melt wall slip on the flow balance of profile extrusion dies. Novel Trends in Rheology V, 2013.
2012 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T., Slip Effects on the Stick-Slip Flow of a sPTT Fluid, MEFTE 2012 – IV Conferência Nacional em Mecânica Dos Fluidos, Termodinâmica e Energia, Lisboa, Portugal, May, 2012
2012 L.L. Ferrás, Afonso, A.M., Nóbrega, J.M., Alves, M.A., Pinho, F.T., The Influence of Slip Boundary Conditions on the 4:1 Expansion Flow of an sPTT Fluid, 17th International Workshop on Numerical Methods for Non-Newtonian Flows, Blois, France, March, 2012.
2012 L.L. Ferrás, Afonso, A.M., Nóbrega, J.M., Alves, M.A., Pinho, F.T., Numerical simulation of viscoelastic fluids past a cylinder under the influence of slip velocity, The XVIth International Congress on Rheology, August 5-10, Lisbon, Portugal, 2012.
2012 L.L. Ferrás, Afonso, A.M., Nóbrega, J.M., Alves, M.A., Pinho, F. T. , Development Length of Laminar Channel Flows with Slip Velocity at the Walls, ECCOMAS 2012 – 6th European Congress on Computational Methods in Applied Sciences and Engineering, Vienna, Austria, September 10-14, 2012.
2011 Invited Talk - L.L. Ferrás, Design of profile extrusion Dies: the effect of wall slip, Semana da Engenharia 2011, Guimarães, Portugal, October 2011.
(Portugal)
2011 L.L. Ferrás, Carneiro, O.S., Pinho, F.T., Nóbrega, J.M. – Wall Slip Effects in Planar Contraction Channel Flows of Newtonian and sPTT Fluids, VI International Materials Symposium MATERIAIS 2011, Guimarães, Portugal, April 2011.
2011 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T., Implementation of the Wall Slip Boundary Condition in a Computational Rheology Code based on the Finite Volume Method, 83rd Annual Meeting of the The Society of Rheology, Cleveland, USA, October 2011.
2010 L.L. Ferrás, Pinho, F.T., Carneiro, O.S. , Nóbrega, J.M. – The effect of wall slip in 4:1 contraction flows of a PTT fluid, PPS-26 Annual Meeting of the Polymer Processing Society, Banff, Canada, July 2010.
2009 L.L. Ferrás, Pinho, F.T., Carneiro, O.S. , Nóbrega, J.M. – Explicit vs implicit numerical implementation of the wall slip boundary condition, PPS-2009 Europe / Africa Regional Meeting of the Polymer Processing Society, Larnaca, Cyprus, October 2009.
2008 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T.,Carneiro, O.S. – Implementation of a Slip Boundary Condition in a Finite Volume Code Aimed to Predict Fluid Flows, II Conferência Nacional de Métodos Numéricos em Mecânica de Fluidos e Termodinâmica. Aveiro: May, 2008.
2008 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T., Carneiro, O.S. – The Effect of Wall Slip in Contraction Flows, PPS-24 Annual Meeting, Salerno, Italy, June 2008.
2007 Nóbrega, J. M., Carneiro, O. S., L.L. Ferrás, Recent Developments in Profile Extrusion: Automatic Design of Extrusion Dies and Calibrators, 9º Congresso Brasileiro de Polímeros. Campina Grande, Brazil, October 2007.
2007 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T., Carneiro, O.S., Profile Extrusion Die Design: the Effect of Wall Slip, Materiais 2007-IV International Materials Symposium, Porto, Portugal, April 2007.
2007 L.L. Ferrás, Nóbrega, J.M., Pinho, F.T., Carneiro, O.S. – Optimisation of Profile Extrusion Dies: the Effect of Wall Slip, PPS-23 Annual Meeting, Salvador, Brasil, June 2007.
2007 Carneiro, O.S., Nóbrega, J. M., L.L. Ferrás, Automatic Design of Extrusion Tools for the Production of Thermoplastic Profiles, Extrusion Minitec & Conference “Advances in Extrusion Technology”. Dusseldorf, Germany, October 2007.

Supervision

Thesis Title
Role 		Degree Subject (Type)
Institution / Organization
2018 - Current Numerical studies on integro-differential fractional viscoelastic models
Co-supervisor of Rosalía Taboada Leiva
 Ph.D. in Mathematics (PhD)
Institute for Mathematical Sciences and Computation, University of São Paulo (USP), Brazil
2020 - 2020 Public Parking Enhancer - Mathematics and Computation
Supervisor
 Master in Mathematics and Computation – Category: Machine learning, Internet of Things, Artificial Inteligence (Master)
Universidade do Minho Centro de Matemática, Portugal
2020 - 2020 Machine Learning and Image Processing - Mathematics and Computation
Supervisor
 Master in Mathematics and Computation – Category: Machine learning, Internet of Things, Artificial Inteligence (Master)
Universidade do Minho Centro de Matemática, Portugal
2019 - 2019 Smart Traffic Signals - Mathematics and Computation
Supervisor
 Mathematics - Topic: “Smart Traffic Signals”. Category: Machine learning, Internet of Things, Artificial Inteligence (Degree)
Universidade do Minho, Portugal
2017 - 2017 Rheology of Rubbers
Supervisor
 Master in Polymer Engineering (Master)
Universidade do Minho, Portugal
2016 - 2016 Numerical Modeling of Injection Molding
Supervisor
 Master in Polymer Engineering (Master)
Universidade do Minho, Portugal
2015 - 2015 Key features of Materials for the Fused Deposition Modelling Process
Supervisor
 European Masters in Engineering Rheology (Master)
Universidade do Minho, Portugal

Event organisation

Event name
Type of event (Role) 		Institution / Organization
2019 - 2019 3rd Iberian Meeting of OpenFOAM® technology (software to solve differential equations by the finite volume method), Porto, Portugal 2019. (2019 - 2019)
Conference (Member of the Organising Committee)
 Universidade do Porto, Portugal
2018 - 2018 National Meeting of the Portuguese Society of Mathematics, Mini-symposium - Fractional Calculus: Theory and Applications. Bragança, Portugal 2018 (http://www.enspm2018.ipb.pt/PT_index.html) (2018 - 2018)
Conference (Member of the Organising Committee)
 Instituto Politécnico de Bragança, Portugal
2017 - 2017 International Conference MODEST WORKSHOP}, Algarve, Portugal 2017 (http://www.chemia.pk.edu.pl/modest-workshop-2017/) (2017 - 2017)
Conference (Member of the Organising Committee)
 Universidade do Minho, Portugal
2017 - 2017 Second Portuguese Meeting in OpenFOAM} (FOAM@PT), Coimbra, Portugal 2017 (https://2017.foam-iberia.eu/) (2017 - 2017)
Conference (Member of the Organising Committee)
 Universidade de Coimbra, Portugal
2016 - 2016 11th OpenFOAM Workshop - 2016, Guimarães, Portugal. (2016 - 2016)
Conference (Member of the Organising Committee)
 Universidade do Minho, Portugal
2015 - 2015 15th International Conference on Computational and mathematical methods in Science and Engineering} (CMMSE 2015) - Mini-symposium: Analytical and Numerical Methods for Fractional Differential Equations, Cadiz, Spain. (2015 - 2015)
Conference (Member of the Organising Committee)
2015 - 2015 First Portuguese Meeting in OpenFOAM (FOAM@PT), Guimarães, Portugal 2015. (2015 - 2015)
Conference
 Universidade do Minho, Portugal

Event participation

Activity description
Type of event 		Event name
Institution / Organization
2019/07 - 2019/07 Cost Action – Computational Methods for Fractional-Order Problems. Bari, Italy, July 22-26 (2019)
Workshop
 Cost Action – Computational Methods for Fractional-Order Problems
Politecnico di Bari, Italy
2018 - 2018 Session Moderator: SPM - Mini-symposium - Fractional Calculus: Theory and Applications.
Conference
 National Meeting of the Portuguese Society of Mathematics, Mini-symposium - Fractional Calculus: Theory and Applications. Bragança, Portugal 2018.
Instituto Politécnico de Bragança, Portugal
2018 - 2018 Outreach activities • (2018) Educational Talk: The Relevance of Mathematics for Industry - lecture for high school students
Seminar
 The Relevance of Mathematics for Industry - lecture for high school students
2017/07 - 2017/07 FEUP - Universidade do Porto - Portugal - 1st Summer School on Complex fluid-Flows in Microfluidics: July 10-14 (2017)
Workshop
 1st Summer School on Complex fluid-Flows in Microfluidics
Universidade do Porto, Portugal
2016 - 2016 Session Moderator - 11th OpenFOAM Workshop
Conference
 11th OpenFOAM Workshop
Universidade do Minho, Portugal
2015 - 2015 Cost Action - Flowing Mater. One week course on Lattice Boltzman method. Madrid, Spain (2015)
Workshop
 Cost Action - Flowing Mater
2015 - 2015 Session Moderator - (CMMSE 2015) - Mini-symposium: Analytical and Numerical Methods for Fractional Differential Equations (CMMSE 2015) - Mini-symposium: Analytical and Numerical Methods for Fractional Differential Equations, Cadiz, Spain.
2012 - 2012 Instituto Politécnico do Cávado e do Ave - Portugal - 40 hours course on “Data analysis with SPSS (2012)"
Workshop
 Data analysis with SPSS (2012)
Instituto Politécnico do Cávado e do Ave, Portugal
2010 - 2010 University of Pecs, Hungary. One week course on “High Performance Computations for Engineering – International PhD Course” - 2010
Workshop
 High Performance Computations for Engineering – International PhD Course
Pécsi Tudományegyetem, Hungary
2006 - 2006 Multimedia Course (448 hours). Photoshop, Fireworks, Soundforge, Dreamweaver, Flash, Javascript - 2006
Workshop
 Multimedia Course (448 hours)

Jury of academic degree

Topic
Role 		Candidate name (Type of degree)
Institution / Organization
2021/03/10 Numerical studies of the natural formulation of the tensor: application in viscoelastic flows with slip
(Thesis) Main arguer
 Fabiano Ruano Neto (Master)
Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
2020/05/05 Simulações Numéricas de Escoamentos Viscoelásticos Utilizando OpenFOAM
(Thesis) Arguer
 Luiz Haines Junior (Master)
Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
2018 Simulação do processo de extrusão de compostos de borracha / Numerical simulation of the extrusion of rubber compounds
(Thesis) Main arguer
 Vitor Hugo Barros Pereira (Master)
Universidade do Porto, Portugal
2018 Dynamics of large-scale perturbations of steady convective dynamos in a horizont plane layer of electrically conducting fluid
(Thesis) Main arguer
 Simon Ranjith Jeyabalan (Other)
Universidade do Porto Faculdade de Ciências, Portugal
2017 Estudo numérico de instabilidades elásticas numa micro bifurcação / Numerical study of the elastic instabilites in a micro bifurcation
(Thesis) Main arguer
 Delfim Augusto Nobre dos Reis Teixeira (Master)
Universidade do Porto, Portugal
2017 Heat transfer enhancement in viscoelastic fluids
(Thesis) Main arguer
 Luís Pedro Martins e Mendes (Master)
Universidade do Porto, Portugal
2017 High-Fidelity Numerical Investigations on Micro-physics of Complex fluids
(Thesis) Main arguer
 Artur Filipe Sucena Martins Ferreira (Other)
Universidade do Porto Faculdade de Engenharia, Portugal
2016 Numerical study of the development length in viscoelastic fluids
(Thesis) Main arguer
 Guilherme Luís de Sousa Fialho Guedes (Master)
Universidade do Porto, Portugal
2015 Theoretical and numerical studies of flows with slip
(Thesis) Main arguer
 Caroline Viezel (Master)
Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
2015 Numerical study of flows in bifurcations
(Thesis) Main arguer
 Márcio Quintela (Master)
Universidade do Porto, Portugal
2014 Application of open-source software in the design of microfluidic devices for controlled deformation of biomolecules
(Thesis) Main arguer
 Francisco Manuel Pinheiro Pimenta (Master)
Universidade do Porto, Portugal

Committee member

Activity description
Role 		Institution / Organization
2019 - 2019 Administrative duties: new Master in Applied Mathematics; Developed two Curricular Units for the new Master in Applied Mathematics (University of Minho): -A Mathematical Introduction to Continuum Mechanics: Key learning outcomes -Mathematical and Computational Mechanics
Member
 Universidade do Minho, Portugal

Conference scientific committee

Conference name Conference host
2016 - 2016 11th OpenFOAM Workshop University of Minho

Consulting

Activity description Institution / Organization
2017 - 2017 The master thesis by Jorge Mendes was was a joint work with the company CONTINENTAL MABOR – Tire Industry, S.A. CONTINENTAL MABOR – Tire Industry, S.A., Portugal

Course / Discipline taught

Academic session Degree Subject (Type) Institution / Organization
2020/02 - 2020/07 Mathematical Modelling (with ODE and PDE) (Mestrado) Universidade do Minho, Portugal
2019/09 - 2020/02 Integrated Project (Master in Mathematics and Computation): the students developed a state-of-the art of a pre-master thesis. The topic was "Machine Learning and traffic signals". Master in Mathematics and Computation (Mestrado) Universidade do Minho, Portugal
2019/09 - 2020/02 Calculus I (courses: Mechanical Engineering, Polymer Engineering, Materials Engineering and Applied Statistics) (Mestrado integrado) Universidade do Minho - Campus de Azurém, Portugal
2018 - 2018 Taught a course on Field Operation and Maniplation (PDE solver) at FEUP - Universidade do Porto – Portugal: 2nd Summer School on Complex fluid-Flows in Microfluidics: July 9-13 2018 (Outros) Universidade do Porto, Portugal
2015/09 - 2016/02 Computational fluid Dynamics: Master in Properties and Polymer Technology. Main topics: Introduction to fluid Mechanics, Numerical Methods for the solution of Diffusion, Convection, Convection+Diffusion, and complex problems. (Mestrado integrado) Universidade do Minho - Campus de Azurém, Portugal
2015/02 - 2015/07 Computational fluid Dynamics: Master in Properties and Polymer Technology. Main topics: Introduction to fluid Mechanics, Numerical Methods for the solution of Diffusion, Convection, Convection+Diffusion, and complex problems. (Mestrado integrado) Universidade do Minho - Campus de Azurém, Portugal
2014/09 - 2015/02 Constitutive Modelling and Computational Rheology: EuRheo (European Masters in Engineering Rheology) this Master involves 7 universities: University of Minho, Katholieke Universiteit Leuven, Universidad de Huelva, Universitá Degli Studi Della, Calabria, Université Catholique de Louvain, Univerza v Ljubljani. (Mestrado) Universidade do Minho - Campus de Azurém, Portugal
2015 - 2015 (2015) Taught a course (numerical solution of systems of differential equations with the finite volume method) for Portuguese and Spanish companies (three days course) (Outros)

Mentoring / Tutoring

Topic Student name
2020/11/01 - 2021/12/31 Researcher - Development of a tool for simulating mixed electro-producing systems that aims to satisfy demand, minimizing operating costs. Andreia Costa
2017 - 2018 Researcher - Numerical slution of PDE Wagner Galuppo
2016 - 2016 Post-Doc – Modelling, simulation and experimental work Sacha Mould
2015 - 2016 Post-Doc – Modelling and simulation Marko Milanez

Other jury / evaluation

Activity description Institution / Organization
2011 - Current Referee for journals: Applied Mathematical Modelling, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Applied Numerical Mathematics, International Journal of Dynamical Systems and Differential Equations, Physics of fluids, Applied Sciences, Meccanica, European Journal of Mechanics - B/fluids, International Journal of Thermal Sciences, Energy, Journal of the Brazilian Society of Mechanical Sciences and Engineering, Journal of the Taiwan Institute of Chemical Engineers, Ain Shams Engineering Journal, Journal of Molecular Liquids.
Distinctions

Award

2021 Young Researcher Award (Wolfram Mathematica)
2021 “Best Paper Award” in recognition of the outstanding contribution with the paper entitled “A Numerical Method for the Transient Couette Flow of a Distributed-Order Viscoelastic Fluid“
21th International Conference on Computational Science and Applications (ICCSA 2021), Italy
2021 “Professor João Martins“ Researcher Award (in Applied and Computational Mechanics 2020) by APMTAC (for the best young researcher in Applied and Computational Mechanics 2020)
Associação Portuguesa de Mecânica Teórica Aplicada e Computacional, Portugal
2017 Young Researcher Award (Wolfram Mathematica)
Wolfram Mathematica, United Kingdom
2013 Best PhD Thesis in Applied and Computational Mechanics 2012 - Honorable mention (unanimous decision) from the Portuguese Association of Theoretical, Applied And Computational Mechanics
2011 Best communication “Semana da Engenharia” (2nd place) Guimarães-2011
Universidade do Minho, Portugal
2000 Merit scholarship for undergrad students (Calouste Gulbenkian)
Fundação Calouste Gulbenkian, Portugal

Other distinction

2015 Portuguese Foundation for Science and Technology (FCT) scholarship (Portugal top 10) - Post-Doc SFRH / BPD / 100353 / 2014. (2015-2019) - 64 000 EUR
Fundação para a Ciência e a Tecnologia, Portugal
2012 The article “Analytical solutions for Newtonian and inelastic non-Newtonian flows with wall slip” was recognized by ScienceDirect to be Hot Top 25 - Journal of Non-Newtonian fluid Mechanics
2012 SOR - Travel grant to attend the XVI International Congress on Rheology, Lisbon, Portugal, 2012 (1000 USD).
2011 SOR - Travel grant to attend the conference 83rd Annual Meeting of the Society of Rheology, Cleveland, USA, 2011 (1000 USD)
2008 FCT scholarship – Ph.D. SFRH / BD / 37586 / 2007. (2008-2012) - 51 000 EUR.
Fundação para a Ciência e a Tecnologia, Portugal