A Survey on Fluid Physical Simulation Technology Based on SPH Method

在基于物理的流体模拟技术中，光滑粒子动力学(Smoothed Particle Hydrodynamics, SPH)作为一种拉格朗日粒子方法，它将连续的计算空间离散化为相互作用的粒子，模拟过程中自动保证质量守恒，适合模拟拓扑不断变化的流体运动并捕获其细节特征，已广泛应用于影视特效、数字娱乐、虚拟医学等领域。本文围绕基于SPH方法的流体物理模拟技术，在不可压缩流体模拟、固流交互模拟、漩涡细节恢复和真实感气泡模拟等方面进行深入调研，综述目前国内外研究现状，分析现有方法的优缺点。最后，讨论当前SPH流体模拟技术仍需解决的问题，并给出将来研究的研究趋势。 In the physics-based fluid simulation, Smoothed Particle Hydrodynamics (SPH), as a Lagrangian particle approach, can transit continuous computation space into interactive particles and ensure the conservation of mass during the simulation process. It can also simulate the topology ever- changing fluid motion and capture the details. This has been widely applied to the movie special effects, digital entertainment and virtual medical science, etc. Based on the SPH fluid physics simulation, the paper conducted a deep research on the aspects like incompressible fluid simulation, solid-fluid interaction simulation, vortex detail resuming, real bubble simulation and so on. The current research status, both home and abroad, is stated and existing methods are also analyzed. Finally, the paper discussed the problems that still need to solve in SPH fluid simulation and the research trend in the future.