描述多介质流体力学两步欧拉方法拉氏步中方程的不封闭问题.分析已存在的模型封闭性方法的优缺点,给出根据声速特征的自适应的模型封闭性方法.数值例子表明方法合理可靠,并说明压力弛豫过程在数值计算中的作用.
We describe a problem that the muhifluid dynamic equations are not closed. To solve equations, they must be closed. Existing closing relations are analyzed and an adaptive closing relation method according to sound velocity is given. Numerical example shows that pressure relaxation is also important for pressure equalization in mixed cells.