A simplified set of equations for analysis of the filling . finite difference methods are used for the pressure calculation . advancement of flow f ront uses a control volume approachand dynamic simulation of the moldfilling process is achieved . other is wetting out process which is the most critical stage in rtm . this stage is a typical porous media flow problem 从粘性流体力学的质量和动量方程出发，建立了描述充模流动过程的数学模型，利用有限差分法求解压力方程，并利用控制体积法跟踪流体前沿；第二部分是充模流动的主体部分，属于典型的多孔介质的流动问题。
