ELECTROKINETICS IN A CYLINDRICAL CAPILLARY

Abstract

Electrokinetic phenomena are induced by the relative motion between a fluid and a solid surface and are directly related to the existence of an electrical double layer with excess charges. In this work, we use a theoretical study of electrokinetics in a narrow cylindrical capillary to obtain the streaming potential and electroosmosis coefficients under the thin double layer assumption. We use the obtained theoretical coefficients to compare with experimental data available in literature. The results show a good agreement between the theory and the experimental data and that validates the obtained model. The model for a narrow cylindrical capillary is a basis to understand electrokinetics in porous media.