Simulation of rarefied gas flow in slip and transitional regimes by the lattice Boltzmann method

N. Azwadi C Sidik, N. C. Horng, M. A. Mussa, Shahrir Abdullah

Research output: Contribution to journalArticle

Abstract

In this paper, a lattice Boltzmann method (LBM) based simulation of microscale flow has been carried out, for various values of Knudsen number. The details in determining the parameters critical for LBM applications in microscale flow are provided. Pressure distributions in the slip flow regime are compared to the analytical solution based on the Navier-Stokes equation with slip-velocity boundary condition. Satisfactory agreements have been achieved. Simulations are then extended to transition regime (Kn = 0.15) and compared with the same analytical solution. The results show some deviation from the analytical solution due to the breakdown of continuum assumption. From this study, it can be concluded that the lattice Boltzmann method is an efficient approach for simulation of microscale flow.

Original languageEnglish
Pages (from-to)66-74
Number of pages9
JournalCFD Letters
Volume2
Issue number2
Publication statusPublished - Jun 2010

Fingerprint

Rarefied Gas Flow
Lattice Boltzmann Method
Pressure distribution
Slip
Navier Stokes equations
Flow of gases
Analytical Solution
Boundary conditions
Slip Flow
Knudsen number
Simulation
Pressure Distribution
Breakdown
Navier-Stokes Equations
Continuum
Deviation

Keywords

  • BGK collision model
  • Boltzmann equation
  • Distribution function
  • Microchannel
  • Microscale flow

ASJC Scopus subject areas

  • Modelling and Simulation
  • Fluid Flow and Transfer Processes

Cite this

Simulation of rarefied gas flow in slip and transitional regimes by the lattice Boltzmann method. / Sidik, N. Azwadi C; Horng, N. C.; Mussa, M. A.; Abdullah, Shahrir.

In: CFD Letters, Vol. 2, No. 2, 06.2010, p. 66-74.

Research output: Contribution to journalArticle

Sidik, N. Azwadi C ; Horng, N. C. ; Mussa, M. A. ; Abdullah, Shahrir. / Simulation of rarefied gas flow in slip and transitional regimes by the lattice Boltzmann method. In: CFD Letters. 2010 ; Vol. 2, No. 2. pp. 66-74.
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