My Ph.D. thesis in Mech. Eng. under the title of “Experimental and numerical investigation on forced convection of ferrofluid in horizontal tube partially filled with porous media under magnetic field” recognized as the best one in the defended year. My multidisciplinary Ph.D. subject leads to introduce a new non-dimensional number, Yahya number (Ya), governs magnetic fluid flow was published in J. Magn. Magn. Mater. which was a great achievement for me. Results of my PhD thesis have already published in 4 outstanding journals and one is still under review. Prediction of rheology of nanofluids and its thermophysical properties from experimental data by considering agglomeration effect, Brownian motion and statistical mechanic as well as transition process control to reach nano magnetic powder were also as parts of my PhD thesis. To handle numerical part of my PhD program, I write a tough FORTRAN code using CFD techniques and for experimental part, experimental setup with accurate instrumentation installed in Heat Transfer Lab. Recently, I was a post-doctoral fellowship in Instituto de Telecomunicações (IT), University of Aveiro. I had engaged with Future Passive Optical Network (FutPON) and after deeply reviewing most of recent state-of-the-art, I simulated transient characteristics of Peltier device and Thermo-Electric Cooler (TEC). Thermal management and tunability was our achievement which is crucial in Photonic Integrated Circuit (PIC). An analytical closed-form solution for the transient 1D P-N junction and a 2D numerical solution were developed and as a result of a good corporation with my colleagues, two Journal with one conference paper are already accepted in a short period. Moreover, I had worked on microfluidic fabrication and modeling for photonic sensors to be used in environmental contamination detection. Currently, I am working for Dept. Mech. Eng. in University of Aveiro (UA), as a post-doctoral fellow for the “Smart Green Home” project, granted by BOSCH Co, rely on new strategies for the supervision and control of energy consumption that improve energy efficiency and user comfort in buildings, based on the use of artificial intelligence (AI) and deep learning. In order to start this project, I passed an extensive online lessons on AI, regression, clustering, classification, deep learning, TensorFlow and artificial neural network (ANN). Different methods of multi-objective optimization (particle swarm, differential evolution) and architecture of ANN have been integrated into Python code platform to be used in the smart supervised control. For co-simulation, appropriate model is developed in PtolemyII in the platform of Building Control Virtual Test Bed (BCVTB) software to synchronize Python code and EnergyPlus software. Moreover, I have simulated the transient conjugate heat transfer for phase change material (PCM) in a shell-tube heat exchanger for domestic hot water (DHW) application. As it was declared by the juries, due to my potent potentials and professional resume, I was accepted also as a member of Center for Mechanical Technology and Automation (TEMA), which is the most powerful R&D center in UA. In addition, I have served here as a co-supervisor for two MSc Theses: one is under the title of “modeling the dynamics of gas heating systems for predictive control tests” and the other “Study and design of a Tesla turbine using computational tools” in which thermohydrodynamic characteristics of Tesla turbine has been investigated using CFD method. Moreover, in this period, I have been honored to be as an editorial board in the journal of “Petroleum and Chemical Industry International” and “Int. J. of Petrochemical Science & Engineering” as well as “J. of Engineering Technology and Applied Sciences”. Currently I am also a reviewer of Elsevier Journals such as Engineering and Computational Mechanics and J. Thermal Analysis and Calorimetry.

Personal identification

Full name
Yahya Sheikhnejad

Citation names

  • Sheikhnejad, Yahya

Author identifiers

Ciência ID

Email addresses

  • yahya@ua.pt (Professional)


  • Universidade de Aveiro, 3810-193, Aveiro, Aveiro, Portugal (Professional)


Knowledge fields

  • Engineering and Technology - Mechanical Engineering - Mechanical Engineering
  • Engineering and Technology - Mechanical Engineering - Thermodynamics
  • Exact Sciences - Computer and Information Sciences


Language Speaking Reading Writing Listening Peer-review
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
Portuguese Elementary (A2) Elementary (A2) Intermediate (B1) Elementary (A2)
Degree Classification
PhD of Mechanical Engineering (Doktor (PhD))
Amirkabir University of Technology, Iran

Amirkabir University of Technology Department of Mechanical Engineering, Iran
"Numerical and experimental investigation of forced ferroconvection in horizontal tube partially filled with porous media in presence of magnetic field" (THESIS/DISSERTATION)
Master of science in Mechanical engineering (Master)
Shahid Bahonar University Department of Mechanical Engineering, Iran

Shahid Bahonar University of Kerman, Iran
"Three dimensional numerical analysis of hydrodynamic characteristics of axial groove journal bearing under magnetic field lubricated with ferrofluid" (THESIS/DISSERTATION)
bachelor of science in Mechanical engineering (Bachelor)
Shahid Bahonar University Department of Mechanical Engineering, Iran

Shahid Bahonar University of Kerman, Iran
"Analytical modelling of Navier-Stocks in 2D microchannel" (THESIS/DISSERTATION)


Host institution
2017 - 2020/07/31 Postdoc (Research) Universidade de Aveiro Centro de Tecnologia Mecânica e Automação, Portugal
2016/07/01 - 2017/05/01 Postdoc (Research) Instituto de Telecomunicações, Portugal


Conference paper
  1. Sheikhnejad, Y.; Vujicic, Z.; Almeida, Á.J.; Bastos, R.; Shahpari, A.; Teixeira, A.L.. "Analytical transient analysis of Peltier device for laser thermal tuning". 2017.
  2. Sheikhnejad, Yahya. "CFD analysis of PDC bit heat transfer by drilling mud flow for their thermal mortality". Paper presented in The 5th National Conf. on CFD Applications in Chemical & Petroleum Industries, Tehran, 2014.
  3. Sheikhnejad, Yahya. "Analytical solution of non-linear Heat conduction in long wire carrying current covered by an insulator". Paper presented in 21st Annual Int. Conf. on Mechanical Engineering, ISME, Tehran, 2013.
Journal article
  1. Sheikhnejad, Yahya. "Energy Harvesting by a Novel Substitution for Expansion Valves: Special Focus on City Gate Stations of High-Pressure Natural Gas Pipelines". Energies 13 4 (2020): https://www.mdpi.com/1996-1073/13/4/956.
  2. Sheikhnejad; Yigitcanlar. "Scientific Landscape of Sustainable Urban and Rural Areas Research: A Systematic Scientometric Analysis". Sustainability 12 4 (2020): 1293. http://dx.doi.org/10.3390/su12041293.
  3. Yahya Sheikhnejad; João Simões; N. Martins; Martins, N.. "Energy Harvesting by a Novel Substitution for Expansion Valves: Special Focus on City Gate Stations of High-Pressure Natural Gas Pipelines". Energies (2020): https://www.mdpi.com/1996-1073/13/4/956.
  4. NEMATI, Behrouz; ZANDI, Sara; AMINNEJAD, Babak; DAVARAZAR, Mahsa; SHEIKHNEJAD, Yahya; JAHANIANFARD, Dina; MOSTAFAIE, Amid. ""Building Information Modelling Execution in Administrative and Commercial Spaces in Iran – A Fuzzy-Delphi Criteria Prioritization "". Journal of Settlements and Spatial Planning SI 6 (2019): 17-27. http://dx.doi.org/10.24193/jsspsi.2020.6.03.
  5. Davarazar, Mahsa; Jahanianfard, Dina; Sheikhnejad, Yahya; Nemati, Behrouz; Mostafaie, Amid; Zandi, Sara; Khalaj, Mohammadreza; Kamali, Mohammadreza; Aminabhavi, Tejraj M.. "Underground carbon dioxide sequestration for climate change mitigation – A scientometric study". Journal of CO2 Utilization 33 (2019): 179-188. http://dx.doi.org/10.1016/j.jcou.2019.05.022.
  6. Zandi, Sara; Nemati, Behrouz; Jahanianfard, Dina; Davarazar, Mahsa; Sheikhnejad, Yahya; Mostafaie, Amid; Kamali, Mohammadreza; Aminabhavi, Tejraj M.. "Industrial biowastes treatment using membrane bioreactors (MBRs) -a scientometric study". Journal of Environmental Management 247 (2019): 462-473. http://dx.doi.org/10.1016/j.jenvman.2019.06.066.
  7. Sheikhnejad, Yahya; Ansari, Amir B.; Ferreira, Jorge; Martins, Nelson. "Effects of parallel magnet bars and partially filled porous media on magneto-thermo-hydro-dynamic characteristics of pipe ferroconvection". International Journal of Heat and Mass Transfer 136 (2019): 1273-1281. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2019.03.085.
  8. Sheikhnejad, Yahya. "A Three-Dimensional Thermo-hydrodynamic Simulation of Compact Cross-Flow Plate Heat Exchanger". Petroleum and Chemical Industry International 2 1 (2019): http://dx.doi.org/10.33140/pcii/02/01/05.
  9. Sheikhnejad, Y.; Gonçalves, D.; Oliveira, M.; Martins, N.. "Can buildings be more intelligent than users?- The role of intelligent supervision concept integrated into building predictive control". Energy Reports (2019): http://www.scopus.com/inward/record.url?eid=2-s2.0-85072996945&partnerID=MN8TOARS.
  10. Almeida, Á.J.; Shahpari, A.; Vujicic, Z.; Sheikhnejad, Y.; Rodrigues, F.; Teixeira, A.L.. "Simplified model for power penalty when using PIN and APD receivers". Optics Communications 392 (2017): 15-19. http://www.scopus.com/inward/record.url?eid=2-s2.0-85010408504&partnerID=MN8TOARS.
  11. Sheikhnejad, Y.; Mehrdad Hosseini, M.; Teixeira, A.; Shahpari, A.; Hosseini, R.; Saffar Avval, M.. "Experimental Investigation and Three-Dimensional Numerical Analysis of Ferroconvection Through Horizontal Tube under Magnetic Field of Fixed Parallel Magnet Bars". Journal of Heat Transfer 139 10 (2017): http://www.scopus.com/inward/record.url?eid=2-s2.0-85021448167&partnerID=MN8TOARS.
  12. Sheikhnejad, Y.; Hosseini, R.; Saffar Avval, M.. "Experimental study on heat transfer enhancement of laminar ferrofluid flow in horizontal tube partially filled porous media under fixed parallel magnet bars". Journal of Magnetism and Magnetic Materials 424 (2017): 16-25. http://www.scopus.com/inward/record.url?eid=2-s2.0-84991713193&partnerID=MN8TOARS.
  13. Sheikhnejad, Yahya. "Laser Thermal Tuning by Transient Analytical Analysis of Peltier Device". IEEE Photonics Journal PP 99 (2017): 1-1.
  14. Sheikhnejad, Y.; Hosseini, R.; Saffar-Avval, M.. "Effect of different magnetic field distributions on laminar ferroconvection heat transfer in horizontal tube". Journal of Magnetism and Magnetic Materials 389 (2015): 136-143. http://www.scopus.com/inward/record.url?eid=2-s2.0-84928412177&partnerID=MN8TOARS.
  15. Sheikhnejad, Y.; Hosseini, R.; Avval, M.S.. "Laminar forced convection of ferrofluid in a horizontal tube partially filled with porous media in the presence of a magnetic field". Journal of Porous Media 18 4 (2015): 437-448. http://www.scopus.com/inward/record.url?eid=2-s2.0-84936930861&partnerID=MN8TOARS.
  16. Nejad, Y.S.; Nassab, S.A.G.. "Three-dimensional numerical analysis of hydrodynamic characteristics of axial groove journal bearings running with ferrofluids under magnetic field". Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 224 7 (2010): 609-619. http://www.scopus.com/inward/record.url?eid=2-s2.0-77954531730&partnerID=MN8TOARS.


Thesis Title
Degree Subject (Type)
Institution / Organization
2018/02/10 - 2018/12/17 Estudo e Dimensionamento de uma Turbina Tesla usando Ferramentas Computacionais
Co-supervisor of Jo~ao Henrique Bernardo Sim~oes
Universidade de Aveiro, Portugal

Committee member

Activity description
Institution / Organization
2017/08/01 - Current Center for Mechanical Technology and Automation-TEMA The scope of the Unit's research and development activities includes multidisciplinary core competencies that are being applied to the technological needs of the manufacturing and process sector. R&D's mission, due to its multidisciplinary nature and high-technology is to an expansion of the Unit's R&D activities and it will enable it to extend its contributions to non-manufacturing and non-process applications. Being a mission-oriented Unit, extensive collaborations with different industries
Universidade de Aveiro Centro de Tecnologia Mecânica e Automação, Portugal

Conference scientific committee

Conference name Conference host
2019/07/22 - 2019/07/25 6th Int. Conf. Energy and Environment Research (ICEER) University of Aveiro


Activity description Institution / Organization
2019/10/01 - Current Active consultation on thermomechanical issues in the field of Photonic Integrated Circuit (PIC) for SFP/XFP PICadvanced Company, Portugal
2019/10/01 - 2020/06/30 Active consultation on mass production and its related problems include alignment as well as thermo-mechanical issues in the field of Photonic Integrated Circuit (PIC) for SFP/XFP. (Oct 2019-now) Focused on PIC packaging include thermal, mechanical and optical constrains and thermal simulation PICadvanced Company, Portugal

Journal scientific committee

Journal title (ISSN) Publisher
2018/01/01 - Current Entropy (1996-1073) MDPI
2018/01/01 - Current Petroleum and Chemical Industry International (2639-7536) Opast Publishing Group
2018/01/01 - Current Journal of Engineering Technology and Applied Sciences (2548-0391) Journal of Engineering Technology and Applied Science
2018/01/01 - Current International Journal of Petrochemical Science & Engineering (2475-5559) MedCrave Group