Abstract
Rapid mixing is essential on the micromixer in microfluidic systems. Mixing in microchannel relies mainly on molecular diffusion due to the laminar flow at low Reynolds number. In this study, the sequential switching of electroosmosis flow is applied to the mixing in microchannel. By switching of the electroosmosis flow sequentially to the T-junction microchannel, the mixing stream is segregated by the two inlet streams on and off, then the mixing process can be accelerated and controlled by increasing the contact surface of two liquids. In this report, the velocity and concentration fields were measured simultaneously by Rhodamine B and tracer particles of 1.0μm diameter suspended in the water.
