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Micromachines 2017, 8(7), 199;

Parametric Study of an Electroosmotic Micromixer with Heterogeneous Charged Surface Patches

Department of Mechanical Engineering, Inha University, Incheon 22212, Korea
Author to whom correspondence should be addressed.
Received: 4 May 2017 / Revised: 15 June 2017 / Accepted: 19 June 2017 / Published: 23 June 2017
(This article belongs to the Special Issue Micro/Nano-Chip Electrokinetics, Volume II)
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A T-shaped micromixer featuring electroosmotic flow with heterogeneous charged surface patches on the channel walls was analyzed, and an improved design was proposed to enhance mixing performance. Numerical analysis was performed using steady Navier-Stokes equations with an additional electrokinetic body force. The numerical results for species concentration were validated with available experimental data. A parametric analysis of the micromixer was performed by varying channel height, channel width, patch width, and externally applied voltage. The effects of these parameters on the flow structure and mixing performance were analyzed in detail. A quantitative measurement based upon the mass variance was employed to quantify the mixing performance. Numerical results of the parametric study were used to propose an improved micromixer design with spacing between adjacent charged patches. The proposed design provided a more favorable flow structure to allow for enhanced mixing performance. View Full-Text
Keywords: micromixer; electrokinetics; electroosmotic flow; charged surface patches micromixer; electrokinetics; electroosmotic flow; charged surface patches

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Ahmed, F.; Kim, K.-Y. Parametric Study of an Electroosmotic Micromixer with Heterogeneous Charged Surface Patches. Micromachines 2017, 8, 199.

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