A unified stochastic particle method based on the Bhatnagar-Gross-Krook model for polyatomic gases and its combination with DSMC

doi:10.1016/j.jcp.2022.111640

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	A unified stochastic particle method based on the Bhatnagar-Gross-Krook model for polyatomic gases and its combination with DSMC
	Fei,Fei 1,2; Hu Y(胡远)3; Jenny,Patrick 2
刊名	JOURNAL OF COMPUTATIONAL PHYSICS
	2022-12-15
卷号	471 页码:21
关键词	Stochastic particle method BGK model DSMC Polyatomic gas Multiscale flows
ISSN号	0021-9991
DOI	10.1016/j.jcp.2022.111640
通讯作者	Fei, Fei(ffei@hust.edu.cn) ; Hu, Yuan(yhu@imech.ac.cn)
英文摘要	Simulating hypersonic flow around a space vehicle is challenging because of the multi -scale and nonequilibrium nature inherent in these flows. To effectively deal with such flows, a hybrid scheme combining the stochastic particle Bhatnagar-Gross-Krook (BGK) method with direct simulation Monte Carlo (DSMC) was developed recently, but only for monatomic gases (Fei et al. (2021) [29]). In this paper, the particle-particle hybrid method is extended to polyatomic gas flows. In the near continuum regime, employing the Ellipsoidal-Statistical BGK model proposed by Dauvois et al. (2021) [22] with discrete lev-els of vibrational energy, the stochastic particle BGK method for polyatomic gases is first established following the idea of the unified stochastic particle BGK (USP-BGK) scheme. It is proven to be of second-order accuracy in the fluid limit. After that, the USP-BGK scheme with rotational and vibrational energies is combined with DSMC to construct a hybrid scheme. The present hybrid scheme for polyatomic gases is validated with numer-ical tests of homogeneous relaxation, 1D shock structure and 2D hypersonic flows past a wedge and a cylinder. Compared to the other stochastic particle methods, the proposed hybrid scheme can achieve higher accuracy at a much lower computational cost. Therefore, it is a more efficient tool to study multiscale hypersonic flows.(c) 2022 Elsevier Inc. All rights reserved.
分类号	一类/力学重要期刊
资助项目	National Natural Science Foundation of China ; LHD Youth Innovation Fund from the State Key Laboratory of High -Temperature Gas Dynamics ; [51876076] ; [LHD2019CX12]
WOS关键词	MONTE-CARLO ; BOLTZMANN-EQUATION ; BGK MODEL ; CONTINUUM ; SIMULATION ; RELAXATION ; ALGORITHM ; NUMBER ; SCHEME ; FLOW
WOS研究方向	Computer Science ; Physics
语种	英语
WOS记录号	WOS:000869453500005
资助机构	National Natural Science Foundation of China ; LHD Youth Innovation Fund from the State Key Laboratory of High -Temperature Gas Dynamics
其他责任者	Fei, Fei ; Hu, Yuan
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90477]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Huazhong Univ Sci & Technol, Sch Aerosp Engn, Wuhan 430074, Peoples R China; 2.Swiss Fed Inst Technol, Inst Fluid Dynam, Sonneggstr 3, CH-8092 Zurich, Switzerland; 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Fei,Fei,Hu Y,Jenny,Patrick. A unified stochastic particle method based on the Bhatnagar-Gross-Krook model for polyatomic gases and its combination with DSMC[J]. JOURNAL OF COMPUTATIONAL PHYSICS,2022,471:21.
APA	Fei,Fei,胡远,&Jenny,Patrick.(2022).A unified stochastic particle method based on the Bhatnagar-Gross-Krook model for polyatomic gases and its combination with DSMC.JOURNAL OF COMPUTATIONAL PHYSICS,471,21.
MLA	Fei,Fei,et al."A unified stochastic particle method based on the Bhatnagar-Gross-Krook model for polyatomic gases and its combination with DSMC".JOURNAL OF COMPUTATIONAL PHYSICS 471(2022):21.