Induced-charge electroosmosis around conducting and janus cylinder in microchip

Abstract

The induced-charge elecetroosmosis around conducting/Janus cylinder with arbitrary Debye thickness is studied numerically, when an direct current weak electric filed is suddenly applied in a confined microchannel. It's found that there are four large cir-culations around the conducting cylinder, and the total flux in the microchannel is ze-ro; there are two smaller circulations around the Janus cylinder, and they are com-pressed to wall. A bulk flux, which has a parabolic relation with the applied electric field, is also predicted.