摘要
讨论了在随体坐标下用有限差分法和原始变量求解二维不可压层流流动问题的一些技巧,包括交错网格格式的选用、差分方程的建立及压力计算的迭代技巧等。对流体经过后向台阶的流动这一示范性问题进行了分析和比较,以证明所述方法的可行性。
Some techniques for solving 2-D incompressible laminar flow,using finite differ- ence method with the primitive variables in the body-fitted coordinates,are discussed.The techniques include the selection of staggered grid scheme ,the establishment of the finite dif- ference equations and an iterative technique for pressure calculation etc.Finally a compara- tive analysis on a benchmark problem,backward-facing step flow,is presented to show its validity and accuracy.
关键词
有限差分法
不可压层流
随体坐标
body-fitted coordinate
primitive variable
staggered grid scheme
