NDLI: 2.5D induced polarization forward modeling using the adaptive finite-element method

Content Provider	Springer Nature Link
Author	Ye, Yi Xin Li, Yu Guo Deng, Ju Zhi Li, Ze Lin
Copyright Year	2014
Abstract	The conventional finite-element (FE) method often uses a structured mesh, which is designed according to the user’s experience, and it is not sufficiently accurate and flexible to accommodate complex structures such as dipping interfaces and rough topography. We present an adaptive FE method for 2.5D forward modeling of induced polarization (IP). In the presented method, an unstructured triangulation mesh that allows for local mesh refinement and flexible description of arbitrary model geometries is used. Furthermore, the mesh refinement process is guided by dual error estimate weighting to bias the refinement towards elements that affect the solution at the receiver locations. After the final mesh is generated, the Jacobian matrix is used to obtain the IP response on 2D structure models. We validate the adaptive FE algorithm using a vertical contact model. The validation shows that the elements near the receivers are highly refined and the average relative error of the potentials converges to 0.4 % and 1.2 % for the IP response. This suggests that the numerical solution of the adaptive FE algorithm converges to an accurate solution with the refined mesh. Finally, the accuracy and flexibility of the adaptive FE procedure are also validated using more complex models.
Starting Page	500
Ending Page	507
Page Count	8
File Format	PDF
ISSN	16727975
Journal	Applied Geophysics
Volume Number	11
Issue Number	4
e-ISSN	19930658
Language	English
Publisher	Chinese Geophysical Society
Publisher Date	2015-01-11
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Induced polarization (IP) dual error estimate weighting unstructured mesh adaptive finite-element (FE) Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Geophysics

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