A weakly compressible smoothed particle hydrodynamics framework for melting multiphase flow

In this study, the transient process of solid–liquid phase change is modeled and simulated by multiphase smoothed particle hydrodynamics (SPH) method. First, to simulate interfacial behaviors melt liquids, SPH model established for immiscible viscous fluids with a large density ratio, where environmental liquid surrounding solid considered, surface tension can be accurately continuum force Based on model, thermal dynamics incorporated describe heat conduction process. The realized directly switching state concerned particle, absorbed latent computed model. Second, validated several simulation cases, including Stefan problem, hydrostatic pressure evolving fluid interface, rising two bubbles, square droplet deformation, effects numerical parameters accuracy stability are also discussed. Third, integrated applied molten formation dropping processes. results show that an initial interface disappears during melting process, new liquid–liquid interfaces gradually form evolve under action tension, gravity, viscosity. Phenomena such as thin-layer capillary instabilities reproduced, showing effectiveness handling flow change.