Lattice-Boltzmann simulation for pressure driven microscale gas flows in transition regime

Xiang-Ji Yue, Ze-Huan Wu, Yao-Shuai Ba, Yan-Jun Lu, Zhi-Peng Zhu and Ba De-Chun ()
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Xiang-Ji Yue: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China
Ze-Huan Wu: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China
Yao-Shuai Ba: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China
Yan-Jun Lu: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China
Zhi-Peng Zhu: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China
Ba De-Chun: School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

International Journal of Modern Physics C (IJMPC), 2015, vol. 26, issue 04, 1-9

Abstract: This paper carries out numerical simulation for pressure driven microscale gas flows in transition flow regime. The relaxation time of LBM model was modified with the application of near wall effective mean free path combined with a combination of Bounce-back and Specular Reflection (BSR) boundary condition. The results in this paper are more close to those of DSCM and IP-DSCM compared with the results obtained by other LBM models. The calculation results show that in transition regime, with the increase of Knudsen number, the dimensionless slip velocity at the wall significantly increases, but the maximum linear deviation of nonlinear pressure distribution gradually decreases.

Keywords: Lattice-Boltzmann; microfluidics; transition regime; relaxation time; slip velocity; 07.05.Tp; 72.15.Lh (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1142/S0129183115500370

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