Development of a microfluidic device for simultaneous mixing and pumping |
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Authors: | Byoung Jae Kim Sang Youl Yoon Kyung Heon Lee Hyung Jin Sung |
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Institution: | (1) Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea |
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Abstract: | We conducted experimental and numerical studies aimed at developing a microfluidic device capable of simultaneous mixing while
pumping. The proposed multifunctional device makes use of alternating current electroosmotic flow and adopts an array of planar
asymmetric microelectrodes with a diagonal or herringbone shape. The pumping performance was assessed in terms of the fluid
velocity at the center of the microchannel, obtained by micro PIV. To assess the mixing, flow visualizations were carried
out over the electrodes to verify the lateral flows. The mixing degree was quantified in terms of a mixing efficiency obtained
by three-dimensional numerical simulations. The results showed that simultaneous mixing and pumping was achieved in the channels
with diagonal or herringbone electrode configurations. A herringbone electrode configuration showed better pumping compared
with a reference, as well as enhanced mixing. |
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Keywords: | |
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