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High-Order Compact Difference Scheme and Multigrid Method for Solving the 2D Elliptic Problems

机译:二维椭圆问题的高阶紧致差分格式和多重网格方法

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摘要

A high-order compact difference scheme for solving the two-dimensional (2D) elliptic problems is proposed by including compact approximations to the leading truncation error terms of the central difference scheme. Amultigridmethod is employed to overcome the difficulties caused by conventional iterative methods when they are used to solve the linear algebraic system arising from the high-order compact scheme. Numerical experiments are conducted to test the accuracy and efficiency of the present method. The computed results indicate that the present scheme achieves the fourth-order accuracy and the effect of the multigrid method for accelerating the convergence speed is significant.
机译:通过包含中心差分方案的前导截断误差项的紧凑近似,提出了一种用于解决二维(2D)椭圆问题的高阶紧凑差分方案。当使用多重网格方法来解决由高阶紧实方案引起的线性代数系统时,克服了传统迭代方法所带来的困难。进行数值实验以测试本方法的准确性和效率。计算结果表明,该方案达到了四阶精度,并且多重网格方法对加快收敛速度​​的效果是显着的。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第7期|7831731.1-7831731.11|共11页
  • 作者

    Wang Yan; Ge Yongbin;

  • 作者单位

    Ningxia Univ, Sch Math & Stat, Yinchuan 750021, Peoples R China;

    Ningxia Univ, Sch Math & Stat, Yinchuan 750021, Peoples R China;

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  • 正文语种 eng
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