A fast algorithm for Quadrature by Expansion in three dimensions
A fast algorithm for Quadrature by Expansion in three dimensions
复制标题
三维展开求积的快速算法
DOI:
10.1016/j.jcp.2019.03.024
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发表时间:
2019
影响因子:
4.1
通讯作者:
Klöckner, Andreas
中科院分区:
文献类型:
--
作者:
Wala, Matt;Klöckner, Andreas
This paper presents an accelerated quadrature scheme for the evaluation of layer potentials in three dimensions. Our scheme combines a generic, high order quadrature method for singular kernels called Quadrature by Expansion (QBX) with a modified version of the Fast Multipole Method (FMM). Our scheme extends a recently developed formulation of the FMM for QBX in two dimensions, which, in that setting, achieves mathematically rigorous error and running time bounds. In addition to generalization to three dimensions, we highlight some algorithmic and mathematical opportunities for improved performance and stability. Lastly, we give numerical evidence supporting the accuracy, performance, and scalability of the algorithm through a series of experiments involving the Laplace and Helmholtz equations.
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