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arXiv 2103.16841math.NAcs.CEcs.NA
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关于变分延迟位势边界积分方程的时空离散

On the space-time discretization of variational retarded potential boundary integral equations

Dominik Pölz, Martin Schanz

摘要:

本文讨论三维波动方程时空边界元方法的实际发展。所采用的试验空间来源于时空柱侧边界的单纯形网格。这种方法真正符合波动方程的解算子的特殊结构,即所谓的延迟势。由于所产生的积分的数值计算是复杂的,这项工作的大部分是由有关延迟层电位和相关的能量双线性型的正交技术的想法。最后,我们瞥见在算法方面的有效实施推迟潜力的时空设置。通过数值实验对所提出的方法进行了验证,说明了它们的能力。

英文摘要:

This paper discusses the practical development of space-time boundary element methods for the wave equation in three spatial dimensions. The employed trial spaces stem from simplex meshes of the lateral boundary of the space-time cylinder. This approach conforms genuinely to the distinguished structure of the solution operators of the wave equation, so-called retarded potentials. Since the numerical evaluation of the arising integrals is intricate, the bulk of this work is constituted by ideas about quadrature techniques for retarded layer potentials and associated energetic bilinear forms. Finally, we glimpse at algorithmic aspects regarding the efficient implementation of retarded potentials in the space-time setting. The proposed methods are verified by means of numerical experiments, which illustrate their capacity.

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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