Electrokinetic effects near the space-inhomogeneous electroactive surfaces
UDC
537.6Abstract
This manuscript considers the model of non-homogeneous membrane having alternating conductive and non-conductive areas. Numerically investigated the hydrodynamics near a membrane under the influence of an external electric field. The effect on the system two mechanisms — Dukhina vortex formation and Rubinstein-Saltzman. It is shown that the predominant mechanism Dukhina except for a narrow region of potential difference values. It was found that for a small amount of non-conductive areas and the main contribution of the system impedance makes the electrolyte resistance, and at large - the conductivity of the membrane. Detected a pronounced maximum current through the membrane, depending on the coverage ratio, where the current intensification can reach 60%.
Keywords:
system Nernst-Planck-Poisson-Stokes, heterogeneous membrane, overlimiting current, electrokinetic instability, electrolyteFunding information
Работа выполнена при поддержке РФФИ (15-58-45123-Инд_а, 14-08-01171_а).
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Copyright (c) 2016 Кирий В.А., Калайдин Е.Н.
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