Unknown
Institute of Electrical and Electronics Engineers (IEEE)
In:
IEEE Geoscience and Remote Sensing Letters, 13 (3). pp. 334-338.
Publication Date:
2020-07-29
Description:
Electromagnetic (EM) surveys are widely used in
geophysical study. Reliable 3-D forward modeling is required for
the inversion and interpretation of geophysical data. We have
introduced a novel method for 3-D EM modeling using stretching
grids, which uses a multigrid iterative solver for solving
the formed linear system of equations based on the staggered
finite-difference method. The developed algorithm is applied for
the simulation of the magnetotelluric fields. We have tested this
new algorithm using synthetic geoelectric models. The proposed
multigrid method using stretching grids is also compared with
the preconditioned Krylov-subspace solvers, the biconjugate gradients
stabilized method, and the generalized minimum residual
method. The developed multigrid method is proved to be more
stable and requires less iterations to converge.
Type:
Article
,
PeerReviewed
Format:
text
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