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Multiple temperature model for the information preservation method and its application to nonequilibrium gas flows
Zhang J(张俊); Fan J(樊菁); Jiang JZ(蒋建政); Fan, J (reprint author), Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Source PublicationJournal of Computational Physics
2011
Volume230Issue:19Pages:7250-7265
ISSN0021-9991
AbstractThe information preservation (IP) method has been successfully applied to various nonequilibrium gas flows. Comparing with the direct simulation Monte Carlo (DSMC) method, the IP method dramatically reduces the statistical scatter by preserving collective information of simulation molecules. In this paper, a multiple temperature model is proposed to extend the IP method to strongly translational nonequilibrium gas flows. The governing equations for the IP quantities have been derived from the Boltzmann equation based on an assumption that each simulation molecule represents a Gaussian distribution function with a second-order temperature tensor. According to the governing equations, the implementation of IP method is divided into three steps: molecular movement, molecular collision, and update step. With a reasonable multiple temperature collision model and the flux splitting method in the update step, the transport of IP quantities can be accurately modeled. We apply the IP method with the multiple temperature model to shear-driven Couette flow, external force-driven Poiseuille flow and thermal creep flow, respectively. In the former two cases, the separation of different temperature components is clearly observed in the transition regime, and the velocity, temperature and pressure distributions are also well captured. The thermal creep flow, resulting from the presence of temperature gradients along boundary walls, is properly simulated. All of the IP results compare well with the corresponding DSMC results, whereas the IP method uses much smaller sampling sizes than the DSMC method. This paper shows that the IP method with the multiple temperature model is an accurate and efficient tool to simulate strongly translational nonequilibrium gas flows. (C) 2011 Elsevier Inc. All rights reserved.
KeywordInformation Preservation Method Direct Simulation Monte Carlo Method Multiple Temperature Model Nonequilibruim Flows Thermal Creep Rarefied Gas Dynamics Simulation Monte-carlo Rarefied-gas Statistical Simulation Microchannel Flows Boltzmann-equation Speed Driven
Subject AreaComputer Science ; Physics
DOI10.1016/j.jcp.2011.05.025
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000294979400011
WOS KeywordSIMULATION MONTE-CARLO ; RAREFIED-GAS ; STATISTICAL SIMULATION ; MICROCHANNEL FLOWS ; BOLTZMANN-EQUATION ; SPEED ; DRIVEN
WOS Research AreaComputer Science ; Physics
WOS SubjectComputer Science, Interdisciplinary Applications ; Physics, Mathematical
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (Grant Nos. 10921062 and 11002147).
DepartmentLHD微尺度和非平衡流动
Classification一类
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45170
Collection高温气体动力学国家重点实验室
Corresponding AuthorFan, J (reprint author), Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang J,Fan J,Jiang JZ,et al. Multiple temperature model for the information preservation method and its application to nonequilibrium gas flows[J]. Journal of Computational Physics,2011,230(19):7250-7265.
APA 张俊,樊菁,蒋建政,&Fan, J .(2011).Multiple temperature model for the information preservation method and its application to nonequilibrium gas flows.Journal of Computational Physics,230(19),7250-7265.
MLA 张俊,et al."Multiple temperature model for the information preservation method and its application to nonequilibrium gas flows".Journal of Computational Physics 230.19(2011):7250-7265.
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