Lattice Boltzmann modelling Knudsen layer effect in non-equilibrium flows

作     者：Tang, G. H. Zhang, Y. H. Gu, X. J. Emerson, D. R. 

作者机构：SERC Daresbury Lab Computat Sci & Engn Dept Warrington WA4 4AD Cheshire England Univ Strathclyde Dept Mech Engn Glasgow G1 1XJ Lanark Scotland 

出 版 物：《EPL》 (欧洲物理学快报)

年 卷 期：2008年第83卷第4期

页      面：40008-1-40008-6页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：EPSRC [EP/D07455X/1] Funding Source: UKRI 

主　　题：NAVIER-STOKES EQUATION HARD-SPHERE MOLECULES RAREFIED-GAS FLOWS NUMERICAL-ANALYSIS MOMENT EQUATIONS THERMAL CREEP FLUID-FLOWS MICROCHANNELS WALL SIMULATION 

摘      要：Due to its intrinsically kinetic nature, lattice Boltzmann (LB) approach to simulating non-equilibrium gas flows has recently attracted significant research interest. Compared with other kinetic methods, it can offer a significantly smaller computational cost. To capture the nonlinear high-order rarefaction phenomena in gas flows, a geometry-dependent gas local mean free path has been proposed to be implemented in our high-order LB model. A series of tests on rarefaction effects and the Knudsen layer interference have been carried out and the simulation results demonstrate our LB model s capability for highly non-equilibrium flows. Copyright (c) EPLA, 2008.