We study a flow of a viscous liquid containing a small admixture of molecules of the electrolyte nature. When moving such a medium in flat microchannels a layer of an uncompensated electric charge is created in a small neighborhood of the walls. In the absence of longitudinal electric current a convective transport of the charged layer induces an electric field component which is directed against the flow. In this case, the bulk Coulomb force appears in the charged layer, which may inhibit the flow. In this paper, based on the researches of authors on the electrification of fluid flows in channels, we assess the potential effects of Coulomb forces on the velocity distribution in the boundary layer and the value of the tangential stress at the wall. We consider different models of electrochemical processes on the walls with charged layers of varying intensity.
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