A three-dimensional unified gas-kinetic wave-particle solver for flow computation in all regimes

Y Chen, Y Zhu, K Xu - Physics of Fluids, 2020 - pubs.aip.org
In this paper, the unified gas-kinetic wave-particle (UGKWP) method has been constructed
on a three-dimensional unstructured mesh with parallel computing for multiscale flow …

A multiscale discrete velocity method for diatomic molecular gas

Q Zhang, C Zhuo, J Mu, C Zhong, S Liu - Physics of Fluids, 2023 - pubs.aip.org
In the previous study, the multiscale discrete velocity method (MDVM) has been developed
for monatomic gas with particle translational motion only. Unlike the unified gas-kinetic …

Unified gas-kinetic wave-particle methods IV: multi-species gas mixture and plasma transport

C Liu, K Xu - Advances in Aerodynamics, 2021 - Springer
In this paper, we extend the unified gas-kinetic wave-particle (UGKWP) methods to the multi-
species gas mixture and multiscale plasma transport. The construction of the scheme is …

[图书][B] A unified computational fluid dynamics framework from rarefied to continuum regimes

K Xu - 2021 - cambridge.org
This Element presents a unified computational fluid dynamics framework from rarefied to
continuum regimes. The framework is based on the direct modelling of flow physics in a …

An implicit adaptive unified gas-kinetic scheme for steady-state solutions of nonequilibrium flows

W Long, Y Wei, K Xu - Physics of Fluids, 2024 - pubs.aip.org
In recent years, nonequilibrium flows have been frequently encountered in various
aerospace engineering and micro-electro-mechanical systems applications. To understand …

Adaptive wave-particle decomposition in UGKWP method for high-speed flow simulations

Y Wei, J Cao, X Ji, K Xu - Advances in Aerodynamics, 2023 - Springer
With wave-particle decomposition, a unified gas-kinetic wave-particle (UGKWP) method has
been developed for multiscale flow simulations. With the variation of the cell Knudsen …

An efficient asymptotic preserving Monte Carlo method for radiative transfer equations

Y Shi, P Song, T Xiong - Journal of Computational Physics, 2023 - Elsevier
In this work, an efficient asymptotic preserving Monte Carlo method is developed for
nonlinear thermal radiative transfer equations. We derive a new approximate macroscopic …

GKS and UGKS for high-speed flows

Y Zhu, C Zhong, K Xu - Aerospace, 2021 - mdpi.com
The gas-kinetic scheme (GKS) and the unified gas-kinetic scheme (UGKS) are numerical
methods based on the gas-kinetic theory, which have been widely used in the numerical …

Unified gas-kinetic wave–particle method for gas–particle two-phase flow from dilute to dense solid particle limit

X Yang, W Shyy, K Xu - Physics of Fluids, 2022 - pubs.aip.org
A unified framework for particulate two-phase flow is presented with a wide range of solid
particle concentration from dilute to dense limit. The two-phase flow is simulated by two …

Unified gas-kinetic wave-particle methods VII: Diatomic gas with rotational and vibrational nonequilibrium

Y Wei, Y Zhu, K Xu - Journal of Computational Physics, 2024 - Elsevier
Hypersonic flow around a vehicle in near space flight is associated with multiscale non-
equilibrium physics at a large variation of local Knudsen number from the leading edge …