A rapid diffusion simulation method of multiple‐fluid coupling combined with MPM and PFM

Abstract

AbstractTo solve the low diffusion efficiency in the multiple‐fluid coupling process by the Lagrangian method, the paper presents a multiple‐fluid coupling simulation algorithm based on MPM and PFM. First, based on the MPM, we model multiphase flow on Eulerian grids and capture the sharp interfaces between immiscible fluids combined with the PFM. The gas phase is further treated as fluid during the gas–liquid interaction. Second, to demonstrate the natural fluid moving evolution from the high energy state to the low energy state, the paper proposes the local minimize bulk energy function to control the low energy state. Finally, the paper designs and achieves various groups of multiple‐fluid coupling comparison experiments. Experimental results showed that the proposed approach can simulate various effects of rapid diffusion in the multiple‐fluid coupling, such as complete dissolution, mutual solubility, extraction, and other phenomena. Meanwhile, our approach is simple to integrate with existing state‐of‐the‐art MPM solvers.