Research PaperNo Access

Simulation of vortex characteristics in a planar $ψ$ $ψ$ -shaped branching microchannel with lattice Boltzmann method

Kai Feng

Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116026, P. R. China

E-mail Address: fengkai@dlmu.edu.cn

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and

Huichen Zhang

Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116026, P. R. China

E-mail Address: hczhang@dlmu.edu.cn

Corresponding author.

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https://doi.org/10.1142/S0129183121500364Cited by:2 (Source: Crossref)

Abstract

The vortex in the branching microchannel enhances the mixing and heat transfer performance. To investigate the vortex intensity quantitatively, a lattice Boltzmann model for incompressible power-law fluid is developed by setting the range of lattice viscosity (0.001 $\leq ν \leq$ $\leq ν \leq$ 1). The validation of the current model is carried out by modeling the vortex in a T-shaped branching channel and the Poiseuille flow of power-law fluids. Then the vortex intensity in the $ψ$ $ψ$ -shaped microchannel is numerically studied in terms of Reynolds number, branching angle and power-law index. The result indicates that both the recirculation length and height increase with the increase of the Reynolds number. The branching angle has a negative impact on the recirculation length, and it has little effect on the recirculation height. The influence of the power-law index on recirculation length and height depends on the Reynolds number.

Keywords:

PACS: 47.11.Qr, 47.32.C-, 47.50.−d

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