计算力学学报2016，Vol.33Issue(3)：412-417,6.DOI:10.7511/jslx201603021
SPH 方法的运动边界条件研究
Research on the moving boundary condition in SPH method
摘要
Abstract
In order to study the integral truncation and unphysical penetration on fluid particles ,a method of setting moving boundary condition was proposed .During every time step ,ghost particles outside the boundaries were generated symmetrically by fluid particles and were given the corresponding physical quantities ,in consideration of repulsive force in the ghost particles .By self‐compiled SPH program that based on the N‐S equation of the Lagrange form ,using one‐dimensional shock tube to exactly verify boundary conditions ,finally to study how the moving boundary conditions were applied in the calculation model .Simulation results of shock tube were basically in line with the exact solutions ,and reasonable results also were calculated in moving boundary model .Moving boundary condition was proposed in the paper to avoid the problem of fluid particles integral truncation near the border ,and prevent unphysical penetration phenomenon .关键词
流体力学/SPH/移动边界/虚粒子/激波管Key words
fluid mechanics/SPH/moving boundary/ghost particles/shock tube分类
数理科学引用本文复制引用
周杰,徐胜利..SPH 方法的运动边界条件研究[J].计算力学学报,2016,33(3):412-417,6.
