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

Author

Listed:
  • Kai Feng

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

  • Huichen Zhang

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

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 ≤ν≤ 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-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.

Suggested Citation

  • Kai Feng & Huichen Zhang, 2021. "Simulation of vortex characteristics in a planar ψ-shaped branching microchannel with lattice Boltzmann method," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 32(03), pages 1-17, March.
    • Handle: RePEc:wsi:ijmpcx:v:32:y:2021:i:03:n:s0129183121500364
    DOI: 10.1142/S0129183121500364
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