Electrical Resistivity Measurement with Spherical-Tipped Cylindrical Electrode Embedded on Two Layers
Chang-Ho Hong1, Song-Hun Chong2, Gye-Chun Cho3
1Division of Radioactive Waste Disposal Research, Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Korea.
Abstract:
Complex geological processes form multiple layers and change pore water chemistry, saturation level, and temperature. Eventually, the strata hinder interpreting electrical resistivity data. There are no studies that theoretically explore the effects of electrode geometries and multiple layered systems on laboratory electrical resistivity measurements. This study formulates a theoretical electrical resistance between half spherical-tipped cylindrical electrodes embedded on two horizontal layers. The electrical resistivity of each layer is considered separately in the general electrical potential equation with different equipotential surface areas. The finite element analysis is conducted to validate the theoretical equation. Further interpretation provides insights into the distribution of electrical current flow under electrical resistivity mismatch for discussion.
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