A Model for the Water Saturation Dependence of Electrical Conductivity of Porous Media

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Luong Duy Thanh
Nguyen Manh Hung
Nguyen Van Nghia
Phan Van Do
Nguyen Tien Hung

摘要

Electrical conductivity (EC) measurement has been extensively applied for characterization of geological media on account of its high sensitivity to various parameters of water-filled porous media (i.e., structure, water content, water composition). It is one of most frequently used methods in geological, geotechnical, and environmental problems. Its effectiveness relies on theoretical models that relate the EC and parameters of porous media. In this work, we develop an EC model for porous media under partially saturated conditions using a bundle of capillary tubes model. The proposed model is expressed in terms of electrical conductivity of pore water, electrical surface conductivity, water saturation, microstructure parameters of porous media (e.g., porosity, tortuosity, minimum and maximum pore radii) and their pore size distribution. The model is then numerically analyzed and successfully compared with experimental data in literature and published models.

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栏目
Physical sciences

参考

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