摘要
应用光滑粒子法(SPH)对具有间断面的不同介质的流动问题进行模拟分析.在现有的SPH方法的理论基础上进行修正,通过对密度近似方程进行正则化处理,在理想气体状态方程中引入Van Der Waals修正项以及对物质点运动速度进行修正,模拟了密度相差较大的两相流动问题,并且使用图解分析了两相交界面在模拟过程中的清晰程度.通过气(液)泡上升以及两相溃坝问题对SPH方法在两相流动问题模拟中的可行性进行了分析.最后应用修正后的SPH方法有效再现了两相流动的物理过程,并且能清晰分辨不同介质之间的交界面,从而说明SPH方法能有效对两相流动进行模拟.
An implementation of the smoothed particle hydrodynamic （SPH） method was presented to treat multi-phase flows with strong discontinuity. The standard SPH theory was modified and implemented to simulate two-phase flow with big density ratio by normalizing the density approximation, appending the Van Der Waals correction item to the state equation of idea gas and modifying the velocity of material particles. As the demonstration of the application of the method, two numerical examples, bubble problem and two-phase dambreak problem, have been investigated. Numerical results reproduced the complex physical process of two-phase flow and indicated that the modified SPH method could solve two-phase flow problems stably and could detect the interface between media distinctly.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第1期28-32,共5页
Journal of Hunan University:Natural Sciences
基金
国防科技预研基金资助项目(51404010205JB1102)
