Simulation of electromagnetic diffusion in anisotropic media

被引：6

作者：

Carcione J.M. ^{[1
]}

机构：

[1] Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Sgonico 34010, Trieste

来源：

Progress In Electromagnetics Research B | 2010年 / 26期

关键词：

D O I：

10.2528/PIERB10100607

中图分类号：

学科分类号：

摘要：

I present an algorithm to simulate low-frequency electro- magnetic propagation in an anisotropic earth, described by a general (non-diagonal) conductivity tensor. I solve the electric formulation by explicitly imposing an approximate form of the condition ▶ J = 0, where J is the current density vector, which includes the source and the induced current. The numerical algorithm consists of a fully spec- tral explicit scheme for solving linear, periodic parabolic equations. It is based on a Chebyshev expansion of the evolution operator and the Fourier and Chebyshev pseudospectral methods to compute the spatial derivatives. The latter is used to implement the air/ocean boundary conditions. The results of the simulations are verified by comparison to analytical solutions obtained from the Green function. Examples of the electromagnetic field generated by a source located at the bottom of the ocean illustrate the practical uses of the algorithm.

引用

页码：425 / 450

页数：25

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