Globally hyperbolic regularized moment method with applications to microflow simulation

Zhenning Cai, Ruo Li, Zhonghua Qiao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

The hyperbolic moment system is derived for the Boltzmann equation with the ES-BGK collision term and wall boundary conditions. The wall boundary conditions we proposed for the moment system have the same number of constraints as required based on the characteristic structures of the hyperbolic moment systems. A numerical scheme is then developed to solve the moment system with both initial and boundary values. The scheme is a finite volume method with customized discretization for the convection term based on the DLM theory [14], and an analytical integration formula is given for the collision term. The numerical experiments are carried out on some benchmark problems in the microflows to show the effectiveness and efficiency of the moment method.
Original languageEnglish
Pages (from-to)95-109
Number of pages15
JournalComputers and Fluids
Volume81
DOIs
Publication statusPublished - 20 Jul 2013

Keywords

  • Boundary conditions
  • ES-BGK model
  • Hyperbolic moment system
  • Microflow

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

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