A generalized lattice Boltzmann model for solid-liquid phase change with variable density and thermophysical properties

Abstract In this paper, we modify the calculations of volume fraction of liquid and temperature, and propose a generalized two-relaxation-time (TRT) lattice Boltzmann model for the solid–liquid phase change problem with variable density and thermophysical properties. Two benchmark problems are used to validate the new model. The results show that this generalized model can handle the differences in both density and thermophysical properties.

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