Electroosmotic Flow in Capillary Tubes

The paper proposes a computation and theoretical methodology for studying electrokinetic phenomena at the solid-electrolyte interface in terms of the continuum model. The main structure which appears at the solid-electrolyte interface is the double layer. In the system with such a structure, fluid motion can occur. This is because the additional motion of electrolyte in the double layer due to both external electric field and diverse physicochemical properties of the surface. In turn, via the friction forces, the electrolyte additional motion leads to the fluid motion beyond the double layer. A study of these phenomena is important for the development of interpretation techniques of well-logging operations, identification of electric properties of cores, and various chemical techniques. It is shown that the electroosmotic flow is associated with the electrolyte ion adsorption on a solid surface, both in the absence and presence of the external electric field.