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Three-Dimensional Resistivity Modeling by Serendipity Element

Serendipity 요소법에 의한 전기비저항 3차원 모델링

  • Lee, Keun-Soo (Department of Geophysics, Kangwon National University) ;
  • Cho, In-Ky (Department of Geophysics, Kangwon National University) ;
  • Kang, Hye-Jin (Department of Geophysics, Kangwon National University)
  • Received : 2012.02.01
  • Accepted : 2012.02.24
  • Published : 2012.02.29

Abstract

A resistivity method has been applied to wide range of engineering and environmental problems with the help of automatic and precise data acquisition. Thus, more accurate modeling and inversion of time-lapse monitoring data are required since resistivity monitoring has been introduced to quantitatively find out subsurface changes With respect to time. Here, we used the finite element method (FEM) for 3D resistivity modeling since the method is easy to realize complex topography and arbitrary shaped anomalous bodies. In the FEM, the linear elements, also referred to as first order elements, have certain advantages of simple formulation and narrow bandwidth of system equation. However, the linear elements show the poor accuracy and slow convergence of the solution with respect to the number of elements or nodes. To achieve the higher accuracy of finite element solution, high order elements are generally used. In this study, we developed a 3D resistivity modeling program using high order Serendipity elements. Comparing the Serendipity element solutions for a cube model with the linear element solutions, we assured that the Serendipity element solutions are more accurate than the linear element solutions in the 3D resistivity modeling.

Acknowledgement

Supported by : 한국연구재단

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