改进的CSF流体表面张力模型

Modified CSF fluid surface tension processing model

传统连续表面力(continuum surface force,CSF)模型模拟流体表面张力时,流体表面的粒子受到的表面张力都是法向力,很难保证流体表面的光滑性,从而使得表面张力模拟失真;此外,流体表面的粒子不足还导致流体表面密度计算精度降低,模拟稳定性差。文章在CSF模型的基础上,对流体表面施加切向力,使得流体表面更加光滑;对边界粒子进行密度修正,提高了密度计算精度和模拟的稳定性。仿真实验结果表明,该方法模拟的流体表面张力效果更好。

When the traditional continuum surface force(CSF) model simulates the fluid surface tension, the surface tension of particles on the fluid surface is normal force, and it is difficult to guarantee the smoothness of the fluid surface, thus making the surface tension simulation distorted. In addition, the lack of particles on the fluid surface leads to lower computational accuracy of the surface density and poor stability of the simulation. In this paper, based on the CSF model, the tangential force is applied to the fluid surface to make the fluid surface smoother. Then the density correction of boundary particles is conducted to improve the computational accuracy of density and the stability of the simulation. Simulation results show that the proposed method performs better in simulating the fluid surface tension.