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FINITE DIFFERENCE SCHEMES FOR THE POISSON EQUATION

波松方程的有限差分法

摘要


In this paper, we review two popular finite difference schemes for solving the Poisson equation in 2-D domains. First, we introduce the standard five-point discretization scheme. An error analysis is also given to show that the accuracy of the five-point scheme is O(h^2 ), where h is the grid size of the spatial discretization. We then introduce a ninepoint finite difference scheme which is O(h^4) accurate. Numerical experiments are carried out to demonstrate the theoretical analysis.

並列摘要


本論文中介紹兩種常用來求解二維波松方程的有限差分法。首先我們介紹標準的五點有限差分格式,同時提供其誤差分析,我們證明此五點格式的精度是二階收斂。緊接著我們介紹另一種四階收斂的九點有限差分格式。數值實驗驗證了此兩種有限差分格式的理論分析。

並列關鍵字

波松方程 有限差分法 誤差分析 2-模 特徵值

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