arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.03438math.AP
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混合Dirichlet-Neumann问题的正则化积分公式

Regularized integral formulation of mixed Dirichlet-Neumann problems

Eldar Akhmetgaliyev, Oscar Bruno

摘要:

本文提出了一种理论讨论,以及新的解决方案算法的散射问题的光滑的二维域下Zaremba边界条件,Dirichlet和Neumann条件指定的域边界的各个部分。提出的数值方法,这是第一次在本贡献的理论基础,关注的详细信息的奇异性结构的解决方案的Helmholtz算子下的边界条件下的Zaremba型。新的数值方法是基于使用的格林函数和积分方程,它依赖于傅立叶延拓法正则化的所有光滑域Zaremba奇点以及新派生的求积规则,从而产生高阶收敛,甚至周围的Zaremba奇点。如本文所示,所得到的算法享有高阶收敛性,它们可以用来有效地解决具有挑战性的Helmholtz边值问题和拉普拉斯本征值问题高阶精度。

英文摘要:

This paper presents a theoretical discussion as well as novel solution algorithms for problems of scattering on smooth two-dimensional domains under Zaremba boundary conditions for which Dirichlet and Neumann conditions are specified on various portions of the domain boundary. The theoretical basis of the proposed numerical methods, which is provided for the first time in the present contribution, concerns detailed information about the singularity structure of solutions of the Helmholtz operator under boundary conditions of Zaremba type. The new numerical method is based on use of Green functions and integral equations, and it relies on the Fourier Continuation method for regularization of all smooth-domain Zaremba singularities as well as newly derived quadrature rules which give rise to high-order convergence even around Zaremba singular points. As demonstrated in this paper, the resulting algorithms enjoy high-order convergence, and they can be used to efficiently solve challenging Helmholtz boundary value problems and Laplace eigenvalue problems with high-order accuracy.

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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