Physical symmetry, spatial accuracy, and relaxation time of the lattice Boltzmann equation for microgas flows

Zhaoli Guo, T. S. Zhao, Yong Shi

Research output: Journal PublicationArticlepeer-review

181 Citations (Scopus)

Abstract

In this paper, we study systematically the physical symmetry, spatial accuracy, and relaxation time of the lattice Boltzmann equation (LBE) for microgas flows in both the slip and transition regimes. We show that the physical symmetry and the spatial accuracy of the existing LBE models are inadequate for simulating microgas flows in the transition regime. Our analysis further indicates that for a microgas flow, the channel wall confinement exerts a nonlinear effect on the relaxation time, which should be considered in the LBE for modeling microgas flows.

Original languageEnglish
Article number074903
JournalJournal of Applied Physics
Volume99
Issue number7
DOIs
Publication statusPublished - Apr 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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