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Modeling coupled DNAPL migration and complex resistivity evolution in saturated porous media

Modélisation couplée de la migration DNAPL et de l'évolution de la résistivité complexe dans des milieux poreux saturés

Abstract : Induced Polarization (IP) is the measurement of the response of electrical conductivity (or resistivity) to an applied range of frequency (usually between a few millihertz to a few tens of kilohertz). It can be applied as a non-intrusive method to investigate Dense Non-Aqueous Phase Liquid (DNAPL) contamination/remediation process. Multiphase flow in porous media can be coupled with the electrical current to simulate the process of DNAPL migration and deliver a broader view in space and time esp. when the results are supported by field measurements or laboratory experiments. In addition to previous works in the literature regarding the coupled simulations of two-phase flow and in-phase electrical resistivity, in this work, we aimed to perform coupled simulations of two-phase flow in porous media and sinusoidal electrical current (i.e. frequency ranging from 0.7Hz to 3000Hz) via the application of complex electrical resistivity.