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

Sidik, N. A. C. and Horng, N. C. and Mussa, M. and Abdullah, S. (2010) Simulation of rarefied gas flow in slip and transitional regimes by the lattice Boltzmann method. CFD Letters, 2 (2). pp. 66-74. ISSN 2180-1363

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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 with the analytical solution based on the Navier-Stokes equationwith 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, we may conclude that the lattice Boltzmann method is an efficient approach for simulation of microscale flow.

Item Type:Article
Uncontrolled Keywords:distribution function, boltzmann equation, BGK collision model, microchannel
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:26023
Deposited By: Liza Porijo
Deposited On:21 Jun 2012 06:30
Last Modified:21 Jun 2012 06:30

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