Finite-element analysis of the electric field distribution in conductance cell

The finite-element method (FEM) for the modeling of the electric field distribution in impedance cells designed according to the assumptions of the van der Pauw method of electrical conductivity (specific conductance) measurement has been used. Particularly, the effect of electrode-electrolyte solution interface (EESI) on the electric field distribution has been studied. It has been found that the EESI of current (driving) electrodes influences the cell electric field distribution. It has been concluded, as well, that the potential difference of the potential electrodes-being a measure of the conductivity of the electrolyte solution filling the cell-does not depend on whether EESI exists, provided the current electrodes are driven from a current source. The results of measurement experiments confirming the FEM studies are presented in the following paper as well.