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Simulation of Flow Past a Square Cylinder by Parallel Lattice Boltzmann Method using Multi-Relaxation-Time Scheme

Published online by Cambridge University Press:  05 May 2011

J.-S. Wu  and
Y.-L. Shao
J.-S. Wu*
Affiliation:
Department of Mechanical Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan
Y.-L. Shao*
Affiliation:
Department of Mechanical Engineering, National Chiao-Tung University, Hsinchu 30050, Taiwan
*
*Professor
**Graduate Research Assistant
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Abstract

The flows past a square cylinder in a channel are simulated using the multi-relaxation-time (MRT) model in the parallel lattice Boltzmann BGK method (LBGK). Reynolds numbers of the flow are in the range of 100 ∼ 1,850 with blockage ratio, 1/6, of cylinder height to channel height, in which the single-relaxation-time (SRT) scheme is not able to converge at higher Reynolds numbers. Computed results are compared with those obtained using the SRT scheme where it can converge. In addition, computed Strouhal numbers compare reasonably well with the numerical results of Davis (1984).

Keywords

Lattice boltzmann methodMulti-relaxation-timeD2Q9 modelSingle-relaxation-timeStrouhal number.

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Type
Articles
Information
Journal of Mechanics , Volume 22 , Issue 1 , March 2006 , pp. 35 - 42
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2006

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