Determine Saturation-dependent (Relative) Electrical Conductivity (Resistivity Index) as in ConductoDict (see also Pfrang et.al.). The pore morphology method can be used to determine the distribution of the phases (then it is assumed to be stationary) or saturation results of a previously simulated wetting process can be used.

The electrical conductivity of the structure materials and of the fluid phases, and the direction(s) of conduction, are entered. For each direction of interest, the Poisson equations is solved. Advection or radiation is not considered.