基于SPH方法的流体细节模拟

Abstract

基于传统的SPH方法，在处理流体粒子飞溅扩散现象，本文采用[1]的固壁边界处理方法，模拟溃坝问题。同时使用一种新[2]的模型。此模型提出，当流体粒子经过扩散，会产生扩散粒子，把这些扩散粒子进行分类，分成喷雾、气泡、泡沫三类颗粒。通过无挡板溃坝问题的模拟，和实验结果进行比较，验证了此固壁边界处理方法的有效性，同时可以明显看出，这三类颗粒很大程度提高了大规模流体细节模拟的视觉效果。最后，通过有挡板的溃坝模拟，进一步观察流体细节模拟在视觉上的逼真效果。 We adopt the solid boundary condition based on the traditional SPH method on the treatment of the fluid particles splashing diffusion phenomenon for the simulation of the dam-break problem, involved in the reference [1]. At the same time, we apply a new model proposed in [2], which shows the diffusion particles are produced when the fluid particles diffuse and are classified into spray, foam and air bubble particles. Through the simulation of dam-break scene without a baffle, the simulation verifies the validity of method with the solid wall boundary processing, comparing with the numerical results. Meanwhile, we could observe obviously that these three kinds of particles greatly improve the visual effect of detail simulation of large-scale fluid. At last, we simulate different dam-break scenes, with the presence of a baffle, for the vivid visual effect of fluid simulation detail further.