An Improved Particle-Based Coupling Method of Fluid and Rigid Bodies

We present an improved particle-based coupling method of fluid and rigid bodies which consists of fluid-rigid coupling and rigid-rigid coupling. To simulate both rigid-rigid and fluid-rigid coupling process, we compute the pressure and friction forces between rigid boundary particles and fluid particles. Then we discretize them by SPH method and obtain the resultant forces of rigid bodies and fluid. The main advantage of our method is that it does not rely on the surface normal of rigid bodies and not affected by the sampling density on rigid boundary. Combined with collision pretreatment and space divided neighboring research, our method can simulate the fluid and rigid bodies coupling process efficiently, which possesses high fidelity and strong robustness.