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• W2783298182 abstract "In this study, a mass-conserving multiphase lattice Boltzmann (LB) model is proposed for simulating the multiphase flows. The proposed model developed in the present study is to improve the model of Shao et al. [“Free-energy-based lattice Boltzmann model for simulation of multiphase flows with density contrast,” Phys. Rev. E 89, 033309 (2014)] by introducing a mass correction term in the lattice Boltzmann model for the interface. The model of Shao et al. [(the improved Zheng-Shu-Chew (Z-S-C model)] correctly considers the effect of the local density variation in momentum equation and has an obvious improvement over the Zheng-Shu-Chew (Z-S-C) model [“A lattice Boltzmann model for multiphase flows with large density ratio,” J. Comput. Phys. 218(1), 353–371 (2006)] in terms of solution accuracy. However, due to the physical diffusion and numerical dissipation, the total mass of each fluid phase cannot be conserved correctly. To solve this problem, a mass correction term, which is similar to the one proposed by Wang et al. [“A mass-conserved diffuse interface method and its application for incompressible multiphase flows with large density ratio,” J. Comput. Phys. 290, 336–351 (2015)], is introduced into the lattice Boltzmann equation for the interface to compensate the mass losses or offset the mass increase. Meanwhile, to implement the wetting boundary condition and the contact angle, a geometric formulation and a local force are incorporated into the present mass-conserving LB model. The proposed model is validated by verifying the Laplace law, simulating both one and two aligned droplets splashing onto a liquid film, droplets standing on an ideal wall, droplets with different wettability splashing onto smooth wax, and bubbles rising under buoyancy. Numerical results show that the proposed model can correctly simulate multiphase flows. It was found that the mass is well-conserved in all cases considered by the model developed in the present study. The developed model has been found to perform better than the improved Z-S-C model in this aspect." @default.
• W2783298182 created "2018-01-26" @default.
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• W2783298182 date "2018-01-01" @default.
• W2783298182 modified "2023-10-04" @default.
• W2783298182 title "A mass-conserving multiphase lattice Boltzmann model for simulation of multiphase flows" @default.
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• W2783298182 doi "https://doi.org/10.1063/1.5004724" @default.
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