Improved lattice Boltzmann model for multi-component diffusion flow with large pressure difference

Fu-Min Liu, An-Lin Wang, Ruo-Fan Qiu and Tao Jiang
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Fu-Min Liu: School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China
An-Lin Wang: School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China
Ruo-Fan Qiu: School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China
Tao Jiang: School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China

International Journal of Modern Physics C (IJMPC), 2016, vol. 27, issue 11, 1-17

Abstract: The pseudopotential lattice Boltzmann model has been widely used to solve multi-phase and multi-component flow problems. However, original pseudopotential model cannot be used in simulating diffusion flow with large pressure difference because of its limitation. In this paper, we incorporate pseudopotential model with a new form of effective mass to solve this problem based on the relationship between pressure difference and effective mass. The improved model is verified through Laplace’s law and binary immiscible Poiseuille flow. By simulating pipeline binary diffusion flow and two-inlet binary cavity jet flow, we show that the improved model can achieve larger pressure difference than pseudopotential model with traditional effective mass forms.

Keywords: Lattice Boltzmann method; multi-component; diffusion flow; large pressure difference (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0129183116501308

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