Planewave Density Interpolation Methods for 3D Helmholtz Boundary Integral Equations
Planewave Density Interpolation Methods for 3D Helmholtz Boundary Integral Equations
复制标题
3D 亥姆霍兹边界积分方程的平面波密度插值方法
DOI:
10.1137/19m1239866
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发表时间:
2019
影响因子:
3.1
通讯作者:
Faria, Luiz
中科院分区:
文献类型:
--
作者:
Pérez-Arancibia, Carlos;Turc, Catalin;Faria, Luiz
This paper introduces planewave density interpolation methods for the regularization of weakly singular, strongly singular, hypersingular, and nearly singular integral kernels present in 3D Helmholtz surface layer potentials and associated integral operators. Relying on Green's third identity and pointwise interpolation of density functions in the form of planewaves, these methods allow layer potentials and integral operators to be expressed in terms of integrand functions that remain bounded or even more regular regardless of the location of the target point relative to the surface sources. Common challenging integrals that arise in both Nyström and boundary element discretization of boundary integral equations can then be numerically evaluated by standard quadrature rules irrespective of the kernel singularity. Closed-form and purely numerical planewave density interpolation procedures are presented in this paper, which are used in conjunction with Chebyshev-based Nyström and Galerkin boundary element methods. A variety of numerical examples, including problems of acoustic scattering involving multiple touching and even intersecting obstacles, demonstrate the capabilities of the proposed technique.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
H. Schulz;C. Schwab;W. Wendland
通讯作者:
W. Wendland
影响因子:
3.5
作者:
Sun Q;Klaseboer E;Khoo BC;Chan DY
通讯作者:
Chan DY
影响因子:
2
作者:
S. Sauter;C. Lage
通讯作者:
C. Lage
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
Carlos Pérez
通讯作者:
Carlos Pérez
影响因子:
4.1
作者:
Fong, William;Darve, Eric
通讯作者:
Darve, Eric