Abstract: The simulation of fluid-solid interaction is an important research topic of physically based simulation technology. It is particularly difficult to solve the problems of non-penetration and slip contact at the interface . This paper puts forward a unified material point method (MPM) for realistic simulation of fluid-solid interaction animation. First, we propose an MPM-based method for simulating weakly compressible fluid, and solve the momentum equation of fluid and solid on the unified background grid. Second, we construct multiple background grids in fluid-solid contact regions, and propose a momentum-conserving velocity-position correction scheme to prevent the penetration artifacts and simulate slip contact. The results demonstrate that the proposed method produces stable and realistic fluid-solid coupling animations which can be applied to computer graphics and virtual reality.

Key words: material point method, fluid-solid coupling, fluid simulation, physically based simulation