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Vol. 151, No. 4, April 2013, pp. 30-35




Numerical Simulation of Mixing Process in Tortuous Microchannel
Reza Hadjiaghaie Vafaie, Mahnaz Mahdipour, Hadi Mirzajani, Habib Badri Ghavifekr

Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran

E-mail: R_Vafaie@sut.ac.ir, M_Mahdipour@sut.ac.ir, H_Mirzajani@sut.ac.ir, Badri@sut.ac.ir


Received: 25 October 2012   /Accepted: 18 April 2013   /Published: 30 April 2013

Digital Sensors and Sensor Sysstems


Abstract: Low Reynolds number flow is one of the main challenges in Lab-On-a-Chipís components like micromixers. In such scale, we need to turn viscose effects into the dominate factors. This study proposes a MEMS-based electroosmotic micromixer, the idea is to perform the mixing operation in curvature of the conventional Lab-On-a-Chip microchannels. The results revealed a high performance mixer, with mixing efficiency of above 90 % for two mixing unit. The frequency response demonstrated the ability of the mixer to produce chaotic mixing associated with stretching, folding and breaking the fluid up, for the frequency range of 2-10 [Hz]. High voltages cause strong electric field gradient in the microchannel. The frequency effect is more significant than the effect of voltage amplitude.


Keywords: Lab-On-a-Chip, MEMS-based, Low Reynolds number flow, Micromixer, Electroosmotic flow


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