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

Suchen Wu; Yongping Chen; Long-Qing Chen

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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Metadata

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

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

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

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