Professor

Hajjar Ahmad

Affiliation: VinUniversity, Hanoi, Viet Nam

CECS

Introduction

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.

Affiliation: VinUniversity, Hanoi, Viet Nam

Research Output

Numerical study on thermal resistance of PCMs incorporated in novel roof structures against energy loss

Nguyen, Hajjar Ahmad, Izadi Mohsen, Sheremet Mikhail A., Ben Hamida Mohamed Bechir
  • Building enclosures
  • Comsol Multiphysics
  • Energy losses
  • Phase change materials
  • Thermal resistance

Controlling energy loss from roof structures equipped by round-corner double semi-hexagonal ferro- phase change material layer using magnetic field

Nguyen, Alshuraiaan Bader, Hajjar Ahmad, Izadi Mohsen, El Idi Mohamed Moussa
  • Energy loss
  • Magnetic field
  • PCM layer
  • Roof structure
  • Round-corner double semi-hexagonal

Assessment of the thermal resistance of novel roof structures incorporating nano-Phase Change Materials capsules under the influence of an external magnetic field

Nguyen, Alshuraiaan Bader, Hajjar Ahmad, Izadi Mohsen, El Idi Mohamed Moussa
  • Magnetic field
  • Nano-PCM-Building material
  • Natural convection
  • Roof structure

Numerical study on permanent magnetic heat transfer inside a dual semicircle enclosure: Controlling by magnet position

Nguyen, Hajjar Ahmad, Izadi Mohsen, Ben Hamida Mohamed Bechir, AlGhamdi AbdulAziz A.
  • Comsol multiphysics
  • Ferrofluid
  • Magnetic convection
  • Porous double semicircle enclosure
  • Two permanent magnets

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Keyphrases

  • anisotropic metal foam layer
  • anisotropic metal foams
  • copper metal foam
  • funnel-shaped geometry
  • latent heat thermal energy storage
  • phase change
  • Extended surfaces
  • Finned PCM
  • Melting and solidification process
  • Nano-PCM
  • Passive parameter
  • PCM-filled porous media
  • Anisotropic metal foams
  • Copper metal foam
  • Kite-shaped geometry
  • Latent heat thermal energy storage (LHTES)
  • Phase change material
  • Anisotropic Metal Foam Layer (AMFL)
  • Asymmetric Hexagon Geometry
  • Copper Metal Foam
  • Latent Heat Thermal Energy Storage (LHTES)
  • Phase Change
  • Ferromagnetic fluids
  • Permanent magnetic-natural convection
  • Porous triple enclosure
  • Two-equation energy model
  • Beeswax
  • Paraffin
  • PCM
  • Thermal management
  • Anisotropic porous structure
  • Hexagonal enclosure
  • Passive control of fluid flow
  • Permanent magnetic field
  • Electronic device
  • Magnetic Rayleigh number
  • Magneto-gravitational convection
  • Non-Newtonian ferrofluid
  • Permanent magnet
  • All-around review
  • Heat exchanger
  • Inserts
  • Passive strategies
  • Thermal storage
  • Turbulators
  • Anisotropic porous medium
  • Partitioned hexagonal enclosure
  • Simultaneous magnetic-convection effect
  • Double wavy wall cavity
  • Energy storage
  • Melting heat transfer
  • NePCM
  • Taguchi optimization method
  • Local thermal non-equilibrium model
  • NEPCM suspension
  • Porous enclosure
  • Thermal vibrational convection
  • Partitioned triple porous enclosure
  • Permanent magnetic-gravitational heat transfer
  • Twin magnets
  • Various configuration
  • Melting phenomenon
  • Multilayer roof structure, energy loss
  • Mechanical vibration
  • Melting temperature
  • Nano-encapsulated phase change material
  • Stefan number
  • Vibrational Rayleigh number
  • Comsol multiphysics
  • Energy losses
  • Innovative block structure
  • Roof structures equipped by PCM
  • Metal foam
  • Building enclosures
  • Comsol Multiphysics
  • Phase change materials
  • Thermal resistance
  • Energy loss
  • Magnetic field
  • PCM layer
  • Roof structure
  • Round-corner double semi-hexagonal
  • Nano-PCM-Building material
  • Natural convection
  • Ferrofluid
  • Magnetic convection
  • Porous double semicircle enclosure
  • Two permanent magnets

Computer Science

  • Condensed Matter Physics