SIMPLE算法中压力松驰因子的自动生成

The Auto Production of Pressure Relaxation Factor in Simple Algorithm

ＳＩＭＰＬＥ算法数值求解流体流动及对流换热问题的难点之一就是压力松驰因子的选取。基于使离散的动量方程残差的平方和最小的原理，建立了压力松驰因子的自动生成方法，程序编制时采用了三种具体的处理方法。对三个典型的算例计算表明，第三种方法最可靠、收敛速度快。

When the SIMPLE algorithm is used to calculate the problem of fluid flow and heat convection numerically, one of the difficulties is how to choose the pressure relaxation factor. Based on the principle of minimizing the square sum of the discrete momentum equations residuals, the pressure relaxation factor may be produced automatically. The three methods are presented when the program is drown up, and they are used to calculate three typical problems. The results show that the third method is the best.