Symmetrized generalized and simplified bernoulli-trials collision schemes in DSMC

M Javani, E Roohi, S Stefanov - Computers & Fluids, 2024 - Elsevier
The collision process is crucial in the direct simulation Monte Carlo (DSMC) method as it
considers the fundamental aspects of the Boltzmann or Kac stochastic equation. This article …

[HTML][HTML] Non-equilibrium flow of van der Waals fluids in nano-channels

B Shan, L Ju, W Su, Z Guo, Y Zhang - Physics of Fluids, 2023 - pubs.aip.org
The Enskog–Vlasov equation provides a consistent description of the microscopic molecular
interactions for real fluids based on the kinetic and mean-field theories. The fluid flows in …

Thermal and second-law analysis of a micro-or nanocavity using direct-simulation Monte Carlo

A Mohammadzadeh, E Roohi, H Niazmand… - Physical Review E …, 2012 - APS
In this study the direct-simulation Monte Carlo (DSMC) method is utilized to investigate
thermal characteristics of micro-or nanocavity flow. The rarefied cavity flow shows …

Binary gas mixtures separation using microscale radiometric pumps

A Lotfian, E Roohi - International Communications in Heat and Mass …, 2021 - Elsevier
In this paper, we suggest the application of micro-scale radiometric pumps for helium‑xenon
binary mixture separation. For this purpose, we consider three geometries of radiometric …

Gas-particle flows in a microscale shock tube and collection efficiency in the jet impingement on a permeable surface

O Ejtehadi, TK Mankodi, I Sohn, BJ Kim, RS Myong - Physics of Fluids, 2023 - pubs.aip.org
We investigate the flow physics of non-equilibrium gases in interaction with solid particles in
a microscale shock tube and the collection efficiency in the jet impingement on a permeable …

Thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic gases in cylindrical Couette flow based on second-order non-Navier–Fourier …

T Chourushi, A Rahimi, S Singh, O Ejtehadi… - International Journal of …, 2022 - Elsevier
The thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic
gases in cylindrical Couette flow are investigated using first-and second-order Boltzmann …

Numerical analysis of rarefied hypersonic flows over inclined cavities

X Jin, X Cheng, Q Wang, B Wang - International Journal of Heat and Mass …, 2023 - Elsevier
A comprehensive numerical analysis is conducted to investigate rarefied hypersonic flows
over two-dimensional (2-D) and three-dimensional (3-D) non-rectangular cavities with …

nccrFOAM suite: Nonlinear coupled constitutive relation solver in the OpenFOAM framework for rarefied and microscale gas flows with vibrational non-equilibrium

TK Mankodi, O Ejtehadi, T Chourushi, A Rahimi… - Computer Physics …, 2024 - Elsevier
The nccrFOAM suite is a collection of nonlinear coupled constitutive relation (NCCR) solvers
for rarefied and microscale gas flows with vibrational non-equilibrium, in conjunction with the …

A parallel DSMC investigation of monatomic/diatomic gas flows in a micro/nano cavity

A Mohammadzadeh, E Roohi… - Numerical Heat Transfer …, 2013 - Taylor & Francis
In the current study, we performed a DSMC investigation to study the nonequilibrium effects
on monatomic and diatomic rarefied flows in micro/nano lid-driven cavity. Our DSMC solver …

A new iterative wall heat flux specifying technique in DSMC for heating/cooling simulations of MEMS/NEMS

H Akhlaghi, E Roohi, S Stefanov - International Journal of Thermal …, 2012 - Elsevier
Micro/nano geometries with specified wall heat flux are widely encountered in electronic
cooling and micro-/nano-fluidic sensors. In the present study we introduce a new iterative …