改进的CSF流体表面张力模型

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英文篇名：Modified CSF fluid surface tension processing model 作者：汪欢欢 ; 朱晓临 ; 殷竞存 英文作者：WANG Huanhuan;ZHU Xiaolin;YIN Jingcun;School of Mathematics,Hefei University of Technology; 关键词：光滑质子流体动力学(SPH)方法 ; 连续表面力(CSF)模型 ; 表面张力 ; 法向力 ; 切向力 ; 密度修正 英文关键词：smoothed particle hydrodynamics(SPH)method;;continuum surface force(CSF)model;;surface tension;;normal force;;tangential force;;density correction 中文刊名：HEFE 英文刊名：Journal of Hefei University of Technology(Natural Science) 机构：合肥工业大学数学学院; 出版日期：2019-01-28 出版单位：合肥工业大学学报(自然科学版) 年：2019 期：v.42;No.309 基金：国家自然科学基金资助项目(61272024) 语种：中文; 页：HEFE201901025 页数：4 CN：01 ISSN：34-1083/N 分类号：147-150

摘要

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.

引文

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