Physically Based Large-scale Fluid-solid Coupling

Recent years, natural phenomena simulation has been a prevalent research area. Physically based Solid-Fluid Coupling simulation is one of its pivotal subjects, and has comprehensive applications in the fields of Computer Animation, Computer Game Engine Development, and Disaster Simulation, etc. However, conventional Solid-Fluid simulation methods are restricted to relative small-scale scenes. Also, fracture simulation is hard to perform in current framework. To overcome these defaults, we propose a physically based large-scale solid-fluid coupling method.To enhance the realistic details of fluid simulation, we propose an improved Divergence-free Smoothed Particle Hydrodynamics (SPH) method in 2nd chapter. We hire a new density adaptive kernel function to make simulation result more accurate. The new method enables more particles participate in computation to facilitate large-scale complex natural phenomena simulation. Also, it is more stable and efficient.In order to implement entirety solid-fluid coupling simulation. We perform voxel-ization for solids in scenes to uniform computation framework. We employ Voronoi tessellation fracture supported Position-based Dynamics to simulate complex solid-fluid coupling scenarios including fracture. Thus improve the reality of simulation process and extend the application fields of solid-fluid coupling.For purpose of improving the efficiency furthermore. We hire Bounding Volume Hierarchy with Distance Fields solver to accelerate collision detection and Compact Hashing algorithm to optimize neighbor-ing search. Results show our method is 36% faster than previous KD-Tree implementation, and 17.9 times in terms of memory continuous than Uniform Grid method.Multiple experiment results have indicated our new method could implement realistic solid-fluid simulation for complex scenes with millions of particles and lay a solid foundation for realistic simulation for various large-scale complex natural phenomena.