提出了数值求解二维泊松方程基于非均匀网格的高阶紧致差分格式,通过选取合适的网格分布参数求解具有边界层的数值算例,空间可以达到四阶精度.并与均匀网格上的计算结果进行比较,充分验证了本文非均匀网格高精度紧致格式的精确性和优越性.
A high order compact difference scheme with non-uniform grids is proposed for solving the two-dimensional(2D) Poisson equation.Reasonable grids distribution parameters are chosen to solve numerical experiments with boundary layers.Fourth-order accuracy can be obtained in space.And comparisons with the results on uniform grids are conducted to demonstrate the accuracy and superiority of the present high order compact scheme.