A dispersion minimizing compact finite difference scheme for the 2D Helmholtz equation

A dispersion minimizing compact finite difference scheme for the 2D Helmholtz equation
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二维亥姆霍兹方程的色散最小化紧凑有限差分格式

DOI:
10.1016/j.cam.2016.08.018
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发表时间:
2017-02
影响因子:
2.4
通讯作者:
Tingting Wu
Tingting Wu
中科院分区:
数学2区
文献类型:
--
作者:
Tingting Wu

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本文给出了求解二维Helmholtz方程的色散最小化紧致有限差分格式,它是一个四阶格式。分析了数值波数与精确波数之间的误差,提出了一种基于数值色散最小化的精细选择策略来选择权重参数。数值结果验证了该格式的有效性和准确性。
In this paper, we present a dispersion minimizing compact finite difference scheme for solving the 2D Helmholtz equation, which is a fourth-order scheme. The error between the numerical wavenumber and the exact wavenumber is analyzed, and a refined choice strategy based on minimizing the numerical dispersion is proposed for choosing weight parameters. Numerical results are presented to demonstrate the efficiency and accuracy of the compact finite difference scheme with refined parameters.
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