A comparison of φ formulae for three-dimensional geo-electromagnetic induction problems
A comparison of φ formulae for three-dimensional geo-electromagnetic induction problems
复制标题
三维地电磁感应问题的Ï公式比较
DOI:
10.1093/jge/gxac038
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发表时间:
2022-07
影响因子:
1.4
通讯作者:
Qihong Wu
中科院分区:
文献类型:
--
作者:
Feng Zhou;Huang Chen;Jingtian Tang;Zhiyong Zhang;Yuan Yuan;Qihong Wu
Abstract Geo-electromagnetic forward modeling problems are ill-posed due to the low signal frequencies being used and electrically insulating air space. To overcome this numerical issue, the $A - phi $ formula using the magnetic vector potentials ($bf A$) and electric scalar potentials ($phi $) was developed. At present, there are two sets of $A - phi $ formulae being used: one has a curl–curl ($nabla times nabla $) structure and another one has a Laplace (${nabla ^2}$) structure where the Coulomb gauge is enforced. The question as to which of the two approaches have superior performance for 3D geo-electromagnetic induction problems still remains open. In this study, we systemically compared the performances of these two $A - phi $ systems in terms of both numerical accuracy and convergence rate. Numerical experiments suggest that for both magnetotelluric and controlled-source electromagnetic problems, the $A - phi $ system with Laplace structure has better performance than the variant with curl–curl structure in terms of convergence rates.
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影响因子:
3.3
作者:
Xushan Lu;C. Farquharson;J. Miehé;Grant Harrison
通讯作者:
Xushan Lu;C. Farquharson;J. Miehé;Grant Harrison
影响因子:
3.3
作者:
J. Lajoie;G. West
通讯作者:
J. Lajoie;G. West
影响因子:
5.2
作者:
R. Yoshimura;N. Oshiman
通讯作者:
R. Yoshimura;N. Oshiman
DOI:
10.1137/060660588
发表时间:
2007-10
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
R. Hiptmair;Jinchao Xu
通讯作者:
R. Hiptmair;Jinchao Xu
影响因子:
4.6
作者:
Ralph-Uwe Börner
通讯作者:
Ralph-Uwe Börner