Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow

LIU Malin

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Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow

LIU Malin * #

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084

*Correspondence author

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Funding: The Specialized Research Fund for the Doctoral Program of Higher Education: the new teacher project（No.No. 20110002120023）

Opened online: 8 May 2014

Accepted by: none

Citation: LIU Malin.Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow[OL]. [ 8 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4591622

The lateral migration of a particle in constant shear flow was investigated using the 3D lattice Boltzmann method. Relationships between particle rotation velocity, lateral velocity, equilibrium lateral position and wall velocity were analyzed and the slip velocity was discussed. Lateral forces, including shear lift force, rotational lift force and lateral drag force, were calculated from the simulation results. The total lateral force changed sign before reaching the equilibrium position. The shear lift force and lateral drag force were much larger than the rotation lift force. The balance between them determined the particle equilibrium lateral position. A new correlation for the shear lift force is proposed by analogy with Saffman's expression.

Keywords:Fluid mechanics in chemical engineering; fluid constant shear flow; lattice Boltzmann method; lateral migration

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