南方科技大学知识苑(SUSTech KC): General synthetic iterative scheme for polyatomic rarefied gas flows

题名	General synthetic iterative scheme for polyatomic rarefied gas flows
作者	Zeng，Jianan; Yuan，Ruifeng; Zhang，Yanbing; Li，Qi; Wu，Lei
通讯作者	Wu，Lei
发表日期	2023-10-30
DOI	10.1016/j.compfluid.2023.105998
发表期刊	Computers and Fluids 影响因子和分区
ISSN	0045-7930
EISSN	1879-0747
卷号	265
摘要	Recently, the general synthetic iterative scheme (GSIS) has been proposed to solve the Boltzmann equation efficiently and accurately in the whole range of gas rarefaction. Here, the GSIS is extended and further improved to find the steady-state solutions in nonlinear polyatomic gas flows. The numerical method is developed within the unstructured finite volume framework, where the kinetic equation and synthetic equations are solved alternately. The synthetic equations, which are derived from the modified Rykov kinetic model, reduce to the two-temperature (translational and rotational) Navier–Stokes–Fourier equations in the continuum flow regime, and include high-order constitutive relations for rarefaction effects in other flow regimes. These high-order terms are obtained by solving the kinetic model with the discrete velocity method. When the synthetic equations are solved, their macroscopic quantities are used to guide the evolution of velocity distribution functions in the kinetic model. As a consequence of this two-way coupling, GSIS not only finds steady-state solutions quickly but also relieves the constraints on spatial cell size. Furthermore, the robustness of GSIS is improved by modifying the boundary macroscopic fluxes in the macroscopic implicit iteration. The efficiency and multiscale property of GSIS is demonstrated through several challenging test cases, including the one-dimensional normal shock wave with large internal-translational relaxation times, the two-dimensional hypersonic flow passing a cylinder, and the pump-driven flow in Europe's demonstration fusion power plant.
关键词	Asymptotic preserving Fast convergence General synthetic iterative scheme Polyatomic rarefied gas flow
相关链接	[Scopus记录]
收录类别	SCI
语种	英语
学校署名	第一 ; 通讯
资助项目	National Natural Science Foundation of China[12172162];
WOS研究方向	Computer Science ; Mechanics
WOS类目	Computer Science, Interdisciplinary Applications ; Mechanics
WOS记录号	WOS:001048435300001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
ESI学科分类	COMPUTER SCIENCE
Scopus记录号	2-s2.0-85165538620
来源库	Scopus
引用统计	被引频次[WOS]：8
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/559523
专题	工学院_力学与航空航天工程系
作者单位	Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China
第一作者单位	力学与航空航天工程系
通讯作者单位	力学与航空航天工程系
第一作者的第一单位	力学与航空航天工程系
推荐引用方式 GB/T 7714	Zeng，Jianan,Yuan，Ruifeng,Zhang，Yanbing,et al. General synthetic iterative scheme for polyatomic rarefied gas flows[J]. Computers and Fluids,2023,265.
APA	Zeng，Jianan,Yuan，Ruifeng,Zhang，Yanbing,Li，Qi,&Wu，Lei.(2023).General synthetic iterative scheme for polyatomic rarefied gas flows.Computers and Fluids,265.
MLA	Zeng，Jianan,et al."General synthetic iterative scheme for polyatomic rarefied gas flows".Computers and Fluids 265(2023).