Коллоидный журнал

The present article deals with the electroosmotic flow through soft nanochannel filled with non-Newtonian ionized liquid, considering the significant ion partitioning effect. The dielectric permittivity of the soft polyelectrolyte layer (PEL), is in general lower than that of the ambient ionized electrolyte solution, which results in significant ion partitioning effect. We adopt the widely used power-law model to describe fluid rheological behavior of ionized fluid flowing through the soft nanochannel under the applied electric field. The electrostatic potential is governed by the Poisson equation. The fluid flow across the electrolyte and PEL are governed by Cauchy momentum equation and modified Darcy-Brinkman equation, respectively along with the equation of continuity for incompressible fluid. Going beyond the widely used Debye- H ckel approximation, we employed the numerical method to solve the governing equations. The impact of pertinent parameters on the overall flow modulation is shown explicitly. We have further presented the results to indicate the ion selectivity across the soft nanochannel considering significant ion partitioning effect.