Imperial College London

Dr Arash Hamzehloo

Faculty of EngineeringDepartment of Mechanical Engineering

Research Associate



+44 (0)20 7594 2442a.hamzehloo




712City and Guilds BuildingSouth Kensington Campus





Arash's main research interests are in the area of computational fluid dynamics. Specifically developing computational frameworks to study:

  • Turbulent under-expanded jets
  • Gas dynamics and compressible flows
  • Supercritical injection
  • Cavitating flows and bubble dynamics
  • Boiling and flash-boiling sprays
  • In-cylinder engine flows and combustion
  • Advanced propulsion systems
  • Hydrogen-based energy systems  

Arash is also interested in aerodynamics, turbomachinery and artificial neural networks (ANNs).

Large eddy simulation (LES) of an under-expanded hydrogen jet with nozzle pressure ratio (NPR) of 10.


Supercritical injection modelling: density field of supercritical nitrogen at 136 K injected into a nitrogen filled ambient at 300 K and ~40 bar (LES with OpenFOAM and with real fluid equation of state and transport properties). 

Under-ExpandedLES of an under-expanded air jet with NPR=4.2. 

Double WedgeDensity gradient of a Mach 7 air flow over a double wedge (OpenFOAM with fourth-order Runge-Kutta temporal discretization).

Ahmed BodyFlow around a bluff body with an incoming velocity of 60 m/s.  Velocity vector visualisation with line integral convolution.