近期，柴振华教授团队的文章《Diffuse-interface modeling and simulation of the containerless freezing of binary fluids with the Marangoni effect》在国际期刊《Physica D: Nonlinear Phenomena》正式发表。

  摘要：This paper introduces a diffuse-interface method for simulating gas-liquid-solid multiphase flows involving freezing, solute transport, and the Marangoni effect. In this framework, a phase-field method is employed to track the evolution of fluid–fluid interfaces, while an enthalpy-based approach is used to describe the temperature field and implicitly track the solid–liquid interface. Solute transport is modeled using a constrained scalar-transport model combined with a pseudo-potential concentration approach. The established diffuse-interface method satisfies the reduction consistency, meaning it can accurately degenerate to the conservative Allen-Cahn equation for multiphase flows and the classical enthalpy method for binary material solidification in an appropriate way. Furthermore, the model not only can preserve the mass conservation, but also can capture the volume change induced by phase change. A lattice Boltzmann (LB) method then formulated to solve the proposed model, and the numerical tests confirm its competence in handling the coupled dynamics of freezing, Marangoni flow, phase-change-induced volume change, and solute transport. Furthermore, the model successfully captures the solute segregation and the thermo-solutal dual Marangoni convection within the freezing sessile droplet. Finally, the model is applied to investigate the freezing dynamics of a system containing an insoluble impurity, where the complex interactions between the advancing freezing front and the impurity are found to be in quantitative agreement with experimental findings.

  论文链接: https://www.sciencedirect.com/science/article/pii/S016727892600120X