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

Fu-Min Liu

School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China

E-mail Address: lfmtim@163.com

Corresponding author.

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An-Lin Wang

School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China

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Ruo-Fan Qiu

School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China

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, and

Tao Jiang

School of Mechanical Engineering, Tongji University, 4800 Caoan Highway, Shanghai, China

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https://doi.org/10.1142/S0129183116501308Cited by:2 (Source: Crossref)

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:

PACS: 11.25.Hf, 123.1K

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