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arXiv 2103.17196math.NAcs.NAmath-phmath.MP
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三维亥姆霍兹方程边界积分的解析计算

Analytical computation of boundary integrals for the Helmholtz equation in three dimensions

Nail A. Gumerov, Ramani Duraiswami

摘要:

通过积分方程方法求解偏微分方程的一个关键问题是评估可能的奇异积分,该积分涉及格林函数及其导数乘以边界的离散表示上的简单函数。对于Helmholtz方程,虽然许多作者使用数值积分来评估这些边界积分,我们提出了这样的积分在平面多边形的无穷级数的形式的解析表达式。这些可以有效地截断的基础上准确的误差界,这是关键,他们的集成方法,如快速多极子方法。

英文摘要:

A key issue in the solution of partial differential equations via integral equation methods is the evaluation of possibly singular integrals involving the Green's function and its derivatives multiplied by simple functions over discretized representations of the boundary. For the Helmholtz equation, while many authors use numerical quadrature to evaluate these boundary integrals, we present analytical expressions for such integrals over flat polygons in the form of infinite series. These can be efficiently truncated based on the accurate error bounds, which is key to their integration in methods such as the Fast Multipole Method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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