Particle-based hybrid and multiscale methods for nonequilibrium gas flows

J Zhang, B John, M Pfeiffer, F Fei, D Wen - Advances in Aerodynamics, 2019 - Springer
Over the past half century, a variety of computational fluid dynamics (CFD) methods and the
direct simulation Monte Carlo (DSMC) method have been widely and successfully applied to …

Unified gas-kinetic wave-particle methods. II. Multiscale simulation on unstructured mesh

Y Zhu, C Liu, C Zhong, K Xu - Physics of Fluids, 2019 - pubs.aip.org
In this paper, we present a unified gas-kinetic wave-particle (UGKWP) method on
unstructured mesh for the multiscale simulation of continuum and rarefied flow. Inheriting …

A novel transient-adaptive subcell algorithm with a hybrid application of different collision techniques in direct simulation Monte Carlo (DSMC)

S Stefanov, E Roohi, A Shoja-Sani - Physics of Fluids, 2022 - pubs.aip.org
A novel hybrid transient adaptive subcell (TAS) direct simulation Monte Carlo (DSMC)
algorithm is proposed to simulate rarefied gas flows in a wide range of Knudsen numbers. It …

A unified stochastic particle Bhatnagar-Gross-Krook method for multiscale gas flows

F Fei, J Zhang, J Li, ZH Liu - Journal of Computational Physics, 2020 - Elsevier
The stochastic particle method based on Bhatnagar-Gross-Krook (BGK) or ellipsoidal
statistical BGK (ESBGK) model approximates the pairwise collisions in the Boltzmann …

[HTML][HTML] A second-order particle Fokker-Planck model for rarefied gas flows

S Kim, W Park, E Jun - Computer Physics Communications, 2024 - Elsevier
Abstract The direct simulation Monte Carlo (DSMC) method has become a powerful tool for
studying rarefied gas flows. However, for the DSMC method to be effective, the cell size must …

An evaluation of the hybrid Fokker–Planck-DSMC approach for high-speed rarefied gas flows

S Kim, E Jun - Computers & Fluids, 2024 - Elsevier
Abstract The Direct Simulation Monte Carlo (DSMC) method has been widely used for
simulations of rarefied gas flows. It has been proven that the numerical solution of the DSMC …

A kinetic model of the Boltzmann equation for non-vibrating polyatomic gases

L Wu, C White, TJ Scanlon, JM Reese… - Journal of Fluid …, 2015 - cambridge.org
A kinetic model of the Boltzmann equation for non-vibrating polyatomic gases is proposed,
based on the Rykov model for diatomic gases. We adopt two velocity distribution functions …

Progress of the unified wave-particle methods for non-equilibrium flows from continuum to rarefied regimes

S Liu, K Xu, C Zhong - Acta Mechanica Sinica, 2022 - Springer
The predictions of the multiple-regime flows from continuum regime to free molecular regime
are crucial for the aerodynamic design in a large number of engineering applications, such …

Fokker–Planck–DSMC algorithm for simulations of rarefied gas flows

MH Gorji, P Jenny - Journal of Computational Physics, 2015 - Elsevier
A Fokker–Planck based particle Monte Carlo algorithm was devised recently for simulations
of rarefied gas flows by the authors [1],[2],[3]. The main motivation behind the Fokker–Planck …

[HTML][HTML] Extended lattice Boltzmann model for gas dynamics

MH Saadat, SA Hosseini, B Dorschner, IV Karlin - Physics of Fluids, 2021 - pubs.aip.org
We propose a two-population lattice Boltzmann model on standard lattices for the simulation
of compressible flows. The model is fully on-lattice and uses the single relaxation time …