Charge Simulation Method Calculation of the Inhomogeneous Electric Field near the Dodecane/Water Interface Generated by Two Needle Electrodes

Abstract

The migration of some micrometer-sized substances existing at and near the dodecane/water interface occurs when a localized direct current inhomogeneous electric field generated by two needle electrodes and a voltage supply is applied. To analysis the migration velocity of the substances, the accurate strength and direction of the inhomogeneous electric field must be known. In the present study, the finite element method and the charge simulation method were adopted to evaluate the electric field. The potential changes at the interface obtained by both these methods were similar, but the potential values were quite different. As a result, the charge simulation method was found to be easier and more accurate than the finite element method.