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An efficient treatment of heat-flux boundary conditions in GSIS for rarefied gas flows
Yanbing Zhang, Ruifeng Yuan, Liyan Luo +1
Heat-flux boundary conditions are challenging to implement efficiently in rarefied gas flow simulations because the wall-reflected gas temperature and density must be determined dy…
Accelerated simulation of multiscale gas-radiation coupling flows via a general synthetic iterative scheme
Jianan Zeng, Qi Li, Yanbing Zhang +2
Gas-radiation coupling critically influences hypersonic reentry flows, where extreme temperatures induce pronounced non-equilibrium gas and radiative heat transport. Accurate and e…
General synthetic iterative scheme for multiscale radiative transfer in the finite-volume framework
Kaiyuan Wang, Yanbing Zhang, Qi Li +1
Achieving efficient and accurate simulation of the radiative transfer has long been a research challenge. Here we introduce the general synthetic iterative scheme as an easy-to-imp…
Adaptive GSIS for rarefied gas flow simulations
Yanbing Zhang, Jianan Zeng, Lei Wu
The parallel solver of the general synthetic iterative scheme (GSIS), as recently developed by Zhang \textit{et. al.} in Comput. Fluids 281 (2024) 106374, is an efficient method to…
Adjoint shape optimization from the continuum to free-molecular gas flows
Ruifeng Yuan, Lei Wu
An adjoint-based shape optimization method for solid bodies subjected to both rarefied and continuum gas flows is proposed. The gas-kinetic BGK equation with the diffuse-reflection…
Multiscale simulation of neutral particle flows in the plasma edge
Yifan Wen, Yanbing Zhang, Lei Wu
The plasma edge flow, situated at the intricate boundary between plasma and neutral particles, plays a pivotal role in the design of nuclear fusion devices such as divertors and pu…
GSIS-ALE for moving boundary problems in rarefied gas flows
Jianan Zeng, Yanbing Zhang, Lei Wu
Multiscale rarefied gas flows with moving boundaries pose significant challenges to the numerical simulation, where the primary difficulties involve robustly managing the mesh move…
Boosting the convergence of DSMC by GSIS
Liyan Luo, Qi Li, Fei Fei +1
A deterministic-stochastic coupling scheme is developed for simulating rarefied gas flows, where the key process is the alternative solving of the macroscopic synthetic equations […
General synthetic iterative scheme for rarefied gas mixture flows
Jianan Zeng, Qi Li, Lei Wu
The numerical simulation of rarefied gas mixtures with disparate mass and concentration is a huge research challenge. Based on our recent kinetic modelling for monatomic gas mixtur…