Accelerated Calderón preconditioning for Maxwell transmission problems
Accelerated Calderón preconditioning for Maxwell transmission problems
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针对麦克斯韦传输问题的加速卡尔德隆预处理
DOI:
10.1016/j.jcp.2022.111099
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发表时间:
2022
影响因子:
4.1
通讯作者:
Kleanthous A
中科院分区:
文献类型:
--
作者:
Kleanthous A
We investigate a range of techniques for the acceleration of Calderón (operator) preconditioning in the context of boundary integral equation methods for electromagnetic transmission problems. Our objective is to mitigate as far as possible the high computational cost of the barycentrically-refined meshes necessary for the stable discretisation of operator products. Our focus is on the well-known PMCHWT formulation, but the techniques we introduce can be applied generically. By using barycentric meshes only for the preconditioner and not for the original boundary integral operator, we achieve significant reductions in computational cost by (i) using “reduced” Calderón preconditioners obtained by discarding constituent boundary integral operators that are not essential for regularisation, and (ii) adopting a “bi-parametric” approach [1],[2] in which we use a lower quality (cheaper) H-matrix assembly routine for the preconditioner than for the original operator, including a novel approach of discarding far-field interactions in the preconditioner. Using the boundary element software Bempp (www. bempp. com), we compare the performance of different combinations of these techniques in the context of scattering by multiple dielectric particles. Applying our accelerated implementation to 3D electromagnetic scattering by an aggregate consisting of 8 monomer ice crystals of overall diameter 1 cm at 664 GHz leads to a 99% reduction in memory cost and at least a 75% reduction in total computation time compared to a non-accelerated implementation.
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影响因子:
2.4
作者:
P. Ylä‐Oijala;S. Kiminki
通讯作者:
S. Kiminki
DOI:
10.1137/s0036142901388731
发表时间:
2002-03
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
S. Christiansen;J. Nédélec
通讯作者:
S. Christiansen;J. Nédélec
DOI:
10.1016/j.camwa.2021.10.012
发表时间:
2020
期刊:
ArXiv
影响因子:
--
作者:
Paul Escapil;C. Jerez
通讯作者:
C. Jerez
影响因子:
2.9
作者:
Scroggs M
通讯作者:
Scroggs M
影响因子:
5.7
作者:
Paul Escapil;C. Jerez
通讯作者:
C. Jerez