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

Xiang-Ji Yue

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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Ze-Huan Wu

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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Yao-Shuai Ba

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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Yan-Jun Lu

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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Zhi-Peng Zhu

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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, and

De-Chun Ba

School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, P. R. China

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https://doi.org/10.1142/S0129183115500370Cited by:3 (Source: Crossref)

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:

PACS: 07.05.Tp, 72.15.Lh

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