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The super-efficient sample mixing induced by the induced-charge electrokinetic flow around conducting/Janus cylinder was numerically studied in a confined |U-shaped microchannel with suddenly applied DC weak electric filed. It’s found that there are four large circulations around the conducting cylinder and two smaller circulations around the Janus cylinder. The results show that samples can still be well mixed with high flux due to the induced electroosmosis. It is demonstrated that the local flow circulations provide effective means to enhance the flow mixing between different solutions. The dependence of the degree of mixing enhancement on the electric field is also predicted.
PAPER REVISED: 2012-09-06
PAPER ACCEPTED: 2012-09-13
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THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Issue 5, PAGES [1534 - 1538]
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