二种投影方法 Projection 1 和 Projection 2 的比较研究

A Comparison Study Between the Projection 1 and Projection 2 Method

对用来解耦二维不可压缩Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程组的ｐｒｏｊｅｃｔｉｏｎ１和ｐｒｏ－ｊｅｃｔｉｏｎ２方法作了比较研究．通过对二个典型例子的计算分析得出，这二种方法可以得到极为一致的流速场，精度相差不大．但是，ｐｒｏｊｅｃｔｉｏｎ２法所需的计算时间比ｐｒｏｊｅｃｔｉｏｎ１方法稍微短些，应优先选用．

In this paper, the projection 1 and the projection 2 method for decoupling the two dimensional incompressible Nervier Stokes equations are compared by two typical flows. It shown that these two methods produced almost identical velocity fields, the difference between these two decoupling methods is very small, but the numerical experiments results that the projection 1 method needs a little more CPU time than the projection 2 method, therefore the last one is preferred to use.