Lattice Boltzmann modelling Knudsen layer effect in non-equilibrium flows

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

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Abstract

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.
Original languageEnglish
Article number40008
Number of pages7
JournalEPL: A Letters Journal Exploring the Frontiers of Physics
Volume83
Issue number4
DOIs
Publication statusPublished - 19 Aug 2008

Keywords

  • computational methods
  • statistical physics
  • nonlinear dynamics
  • fluid dynamics
  • gas dynamics
  • lattice Boltzmann approach

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