近期，柴振华教授团队的文章《A diffuse-interface lattice Boltzmann method for immiscible two-phase flows with chemical reactions at fluid interfaces》在国际期刊《Journal of Computational Physics》发表。

      摘要：Interfacial mass transfer in the reactive two-phase flows is critical to industrial processes and chemical synthesis, yet its accurate modeling remains challenging due to the intricate coupling of mass transfer and heterogeneous reactions at fluid-fluid interfaces. In this work, we first propose a diffuse-interface model to describe immiscible reactive two-phase flows by introducing additional flux and source terms into mass transport equations, and these terms can explicitly account for the effect of heterogeneous reactive boundary condition at the interface. The proposed model is rigorously derived via the weak form of the convection-diffusion equation coupled with heterogeneous reactive boundary condition, in which the smoothed phase-field function is used to approximate the discontinuous sharp-interface indicator, and also ensures the immiscibility of reactive scalars during interfacial reactive mass transfer. To solve this model efficiently, we then develop a diffuse-interface lattice Boltzmann (LB) method. We validate the accuracy of LB method through some benchmark problems, and find that the numerical results are in good agreement with analytical solutions. Finally, we investigate the dynamics of a single reactive droplet in a lid-driven cavity and multiple reactive droplets in a rotating annular cavity with different angular velocities. The results demonstrate that the method is not only accurate in the study of the heterogeneous reactions at immiscible interfaces, but also provides a robust numerical framework for complex multiphase reactive systems.

      论文链接：https://www.sciencedirect.com/science/article/pii/S002199912600625X?pes=vor&utm_source=clarivate&getft_integrator=clarivate