Three-dimensional pseudopotential lattice Boltzmann model for multiphase flows at high density ratio

In this study, we extend the pseudopotential lattice Boltzmann model proposed by Huang and Wu [J. Comput. Phys. 327, 121 (2016)] to a three-dimensional model for practical simulations of multiphase flows with high density ratio. In this model, an additional source term is introduced into the evolution function, and the performed high-order Chapman-Enskog analysis demonstrates that the Navier-Stokes equations with accurate pressure tensor are recovered. Also, an alternative geometric formulation is developed to obtain various contact angles and an iteration scheme is involved in the initialization to improve the stability of the model. Theoretical and numerical investigations both validate that the thermodynamic consistency and tuning surface tension independently of density ratio is achieved through varying the two free parameters in the source term. Numerical simulations of droplet wetting indicate that a large degree range of contact angles can be precisely realized with the implementation of the wetting boundary scheme. Further dynamic examinations of droplet impingement on a thin film and a dry surface also verify the stability and capability of the proposed pseudopotential lattice Boltzmann model.

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Work Title Three-dimensional pseudopotential lattice Boltzmann model for multiphase flows at high density ratio
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Open Access
Creators
  1. Suchen Wu
  2. Yongping Chen
  3. Long-Qing Chen
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Physical Review E
Publication Date 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1103/PhysRevE.102.053308
Deposited August 10, 2022

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  • Added Creator Sandra Elder
  • Added Three-dimensional pseudopotential lattice Boltzmann model for multiphase flows at high density ratio.pdf
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    Publisher
    • Physical Review E
    Publisher Identifier (DOI)
    • https://doi.org/10.1103/PhysRevE.102.053308
    Publication Date
    • 2020-11-18
    • 2020
  • Deleted Creator Sandra Elder
  • Added Creator Suchen Wu
  • Added Creator Yongping Chen
  • Added Creator Long-Qing Chen
  • Updated