Citation Context

...8). They show that the observed perturbations of electrokinetic flow in capillaries might be caused by induced pressure gradient and explained how these induced pressure gradients may globally perturb the flow in an electrokinetcially-driven microfluidic system. Herr et al. (2000) demonstrated the flow pattern with non-uniform zeta potential in electroosmotic capillary flow. Lee et al. (2004) show that the a U-shaped separation channel indicate that varying the zeta potential by controlling the field effect significantly reduces the band dispersion induced by the 90° turns within the channel. Qian and Bau (2005) demonstrate that by time-wise periodic modulation of the zeta potential, one can induce chaotic advection in the cavity. In this study, we propose a method for controlling fluid flow and mixing characteristics with electro-osmosis effect. 1 Copyright © #### by ASME Copyright © 2006 by ASME Use: http://www.asme.org/about-asme/terms-of-use DoSpecifically, we attached metal electrodes on the channel wall, through which we aim at the mixing enhancement. Based on the numerical and experimental study on the fluid flow and mixing, for the case with periodically installed electrodes in the channel wa...

Citation Context

...n the fabrication of microelectrodes in microchannels has intrigued ideas ofscontrolling fluid flow and mixing by using electrodes embedded in walls or in direct contact with thesliquid. Qian and Bau =-=[42]-=- demonstrated chaotic advection within a rectangular cavity by employingstime-dependent slip velocity on the top and bottom wall segments caused by electroosmosis. Theysperformed a two-dimensional num...