（1）　　二维椭圆型流动和传热问题通用计算机程序算法方面的特点

1、　　采用原始变量法，即以速度U、V及压力P作为直接求解的变量

2、　　守恒型的差分格式，离散方程系对守恒型的控制方程通过对控制容积作积分而得出的，无论网格疏密程度如何，均满足在计算区域内守恒的条件；

3、　　采用区域离散化方法B，即先定控制体界面、再定节点位置

4、　　采用交叉网格，速度U、V与其他变量分别存储于三套网格系统中；

-(1) two-dimensional elliptic flow and heat transfer problems in general-purpose computer program is characterized by an algorithm, using the primitive variable method, that is, the speed U, V and pressure P as a direct solution of the variable 2, Conservative difference schemes, the discrete equation Department of Conservative control of the control volume by equation derived for the points, regardless of how the grid density, are calculated to meet the conditions of conservation of the region　3, use of discrete method B, the first fixed control volume interface, and then set the node positions 4, cross-grid use, speed, U, V and other variables are stored in three sets of grid systems