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A Geoelectrical Forward Problem

Application ID: 9636

The classical forward problem of geoelectrics (includes electrical resistivity tomography, ERT and earlier techniques as vertical electric sounding, VES) is the calculation of potentials at a given set of electrodes (M,N) while current is injected at other electrodes (A,B) into the ground.

Typically the physical domain (earth) is unbounded to the sides and the bottom because of which one needs to care for modeling infinity at the computational domains.

This model describes the 3D ERT forward problem for 25 electrodes in a homogeneous ground of 100 Ohm-m and compares it to the analytical solution. An extension covers the switching of electrode configurations and the calculation of sensitivity.

Ce modèle a été construit avec les éléments suivants:

AC/DC Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.