Application of finite element analysis method for modelling of electric field distribution in conductance cells

Electric field distribution in impedance cell designed according to the assumptions of van der Pauw method of electrical conductivity measurement has been used. Particularly the effect of electrode-electrolyte solution interface (EESI) on electric field distribution and conductance cell constants has been studied. It has been found that the EESI of current carrying electrodes influences cell field distribution. It has been concluded as well that the potential difference at potential electrodes-being a measure of conductivity of electrolyte solution filling the cell-does not depend on the fact whether EESI exists provided the current electrodes are driven from current source. The results of measurement experiments proving FEM studies are also presented in the paper