【摘要】 <正>1引言守恒型差分格式用于多介质流体数值计算往往不能得到理想的结果,从双介质Rde mann问题数值结果可以看出,压力、速度在两种介质界面附近出现了非物理振荡.这不是由高精度格式引起的,一阶格式也有同样的现象.著名的Godunov、Roe、Osher等格式都会出现此问题.Harten的TVD格式也发现同样的问题.许多学者分析了出现非物更多还原

【Abstract】 Motivated by the need for three-dimensional methods for interface calculations we describe a 3D non-conservative difference scheme in Lagrange coordinates for calculating multi-component fluid dynamics, according to the thoughts of 2D non-conservative difference scheme and making use of difference method of characteristic and Upwind form. Furthermore, we give a three-dimensional numerical simulation of explosion in concrete, and the results of simulation are consistent with examination.更多还原