改进的各向异性核快速高效重构流体表面

Rapidly and Efficiently Reconstructing Surfaces Using Improved Anisotropic Kernels

针对在SPH(Smoothed Particle Hydrodynamics)方法模拟流体过程中,采用传统各向异性核构造流体表面速度慢的缺陷,提出了简化的各向异性核构造流体表面的方法,通过在流体内部粒子采用各向同性核,边缘粒子采用各向异性核,从而提高了流体表面绘制速度;针对采用传统方法确定粒子各向异性后,粒子体积有所变化的现象,对流体模拟中粒子各向异性的确定方法做了改进,使流体粒子体积趋于一致.实验结果表明,采用本文提出的简化各向异性核方法构造流体表面,不仅使流体的绘制速度有了明显提高,流体表面绘制效果也优于采用传统各向异性核构造的流体表面.

In the SPH fluid simulation, since the speed of reconstructing fluid surfaces using original anisotropic kernels is slow, we present a simplified anisotropic kernels to reconstruct surfaces of particle-based fluids. We improve the speed of reconstructing fluid surface through using isotropic kernels for particles inside the fluid, while anisotropic kernels for particle outside the fluid. Because the size of particles is different when we determine the anisotropy use the original anisotropic kernels, we improve the method of de- termining the anisotropy, so that the size of every particle in the fluid is similar. Experimental results show that the improved simpli-fied anisotropic kernels we proposed is fast, easy to implement, and our results demonstrate a improvement in the quality of recon- structed surfaces as compared to existing methods.