Ahmad Hajjar, PhD
Assistant Professor, Mechanical Engineering program, College of Engineering and Computer Science
Biography
Ahmad Hajjar is an Assistant Professor of Mechanical Engineering in the College of Engineering and Computer Sciences, VinUniversity. Prior to joining VinUniversity in September 2023, he had been working as an Assistant Professor at the University of Lyon, France since 2019, and was a Research Fellow in the Centre for Offshore Research and Engineering at the National University of Singapore in 2018. He received his PhD in Mechanics – Civil Engineering from the University of Lorraine, France in 2017 and a Master’s degree in Mechanics and Energy Processes from the same university in 2014.
• Enhancement of Phase Change Materials for Latent Heat Storage Applications (Metal Foams, Nanoadditives, Nanoencapsulation)
• Analysis of heat transfer of nanofluids in corrugated channels and cavities
• Numerical characterization of Polymer Nano-Composites
• Transport of particles in confined flows
1. Izadi, M., Sheremet, M., Hajjar, A., Galal, A. M., Mahariq, I., Jarad, F., & Hamida, M. B. B., “Numerical investigation of magneto-thermal-convection impact on phase change phenomenon of Nano-PCM within a hexagonal shaped thermal energy storage”, Applied Thermal Engineering, vol. 223, 2023.
2. Shafiei, A., Hajjar, A., Ghasemiasl, R., Armaghani, T., Rashad, A., & Nabwey, H. A, “Nanoparticles migration effects on enhancing cooling process of triangular electronic chips using novel E-shaped porous cavity”. Computational Particle Mechanics, p. 1-16 2022.
3. Izadi, M., Hajjar, A., Alshehri, H. M., Saleem, A., & Galal, A. M., Analysis of applying fin for charging process of phase change material inside H-shaped thermal storage, International Communications in Heat and Mass Transfer, vol. 139, 2022.
4. Atli A., Noyel JPN., Hajjar A., Antouli K., Simon S., “Exploring the mechanical performance of BaTiO3 filled HDPE nanocomposites: A comparative study of the experimental and numerical approaches Polymer”, Polymers, vol. 254, 2022
5. Ghalambaz, S., Hajjar, A., Younis, O., Alsabery, A., & Ghalambaz, M., “A scientometrics investigation of magnetic nanofluids”, Journal of Magnetism and Magnetic Materials, vol. 561, 2022
6. Alsabery A. I., Hajjar A., Sheremet M., Ghalambaz M., Hashim I., “Impact of particles tracking model of nanofluid on forced convection heat transfer within a wavy horizontal channel”, International Communications in Heat & Mass Transfer, vol. 122, 2021
7. Hajjar A., Jamesahar E., Shirivand H., Ghalambaz M., & Mahani R. B., “Transient phase change heat transfer in a metal foam-phase change material heatsink subject to a pulse heat flux”, Journal of Energy Storage, vol. 31, 2020
8. Ghalambaz M., S Mehryan., Hajjar A., Veisimoradi, “Unsteady natural convection flow of a suspension comprising Nano-Encapsulated Phase Change Materials (NEPCMs) in a porous medium”, Advanced Powder Technology, vol.31, 2020.
9. Hajjar A., Mehryan S., Ghalambaz A., “Time periodic natural convection heat transfer in a nano-encapsulated phase-change suspension”, International Journal of Mechanical Sciences, vol.166, 2019.
10. Ghalambaz M., Kasra AA., Hajjar A., “Melting heat transfer of a non-Newtonian phase change material in a cylindrical vertical-cavity partially filled porous media”, International Journal of Numerical Methods for Heat and Fluid Flow, vol. 30, 2019.
11. Hajjar A., Scholtès L., Oltéan C., & Buès M. “Effects of the geometry of two-dimensional fractures on their hydraulic aperture and on the validity of the local cubic law”, Hydrological Processes, vol. 32, 2018.
12. Hajjar A., Scholtès L., Oltéan C., Buès M. “Transport and deposition of weakly inertial particles in closed channel flows at low Reynolds number”, European Journal of Mechanics-B/Fluids, vol. 65, 2017.
2017: Ph.D. in Mechanics – Civil Engineering, University of Lorraine, France.
2014: MSc in Mechanics and Energy, University of Lorraine, France.
2013: MEng in Mechanical Engineering, Lebanese University, Lebanon