Characterization of Chaotic Electroconvection near Flat Inert Electrodes under Oscillatory Voltages.

ABSTRACT: The onset of electroconvective instability in an aqueous binary electrolyte under external oscillatory electric fields at a single constant frequency is investigated in a 2D parallel flat electrode setup. Direct numerical simulations (DNS) of the Poisson⁻Nernst⁻Planck equations coupled with the Navier⁻Stokes equations at a low Reynolds number are carried out. Previous studies show that direct current (DC) electric field can create electroconvection near ion-selecting membranes in microfluidic devices. In this study, we show that electroconvection can be generated near flat inert electrodes when the applied electric field is oscillatory in time. A range of applied voltage, the oscillation frequency and the ratio of ionic diffusivities is examined to characterize the regime in which electroc

SUBMITTER: Kim J 

PROVIDER: S-EPMC6470596 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature