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Micromachines 2014, 5(4), 913-928; doi:10.3390/mi5040913

Mixing Analysis of Passive Micromixer with Unbalanced Three-Split Rhombic Sub-Channels

Department of Mechanical Engineering, Inha University, Incheon 402-751, Korea
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Received: 15 September 2014 / Revised: 3 October 2014 / Accepted: 10 October 2014 / Published: 22 October 2014
(This article belongs to the Special Issue Micromixer & Micromixing)
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Abstract

A micromixer with unbalanced three-split rhombic sub-channels was proposed, and analyses of the mixing and flow characteristics of this micromixer were performed in this work. Three-dimensional Navier-Stokes equations in combination with an advection-diffusion model with two working fluids (water and ethanol) were solved for the analysis. The mixing index and pressure drop were evaluated and compared to those of a two-split micromixer for a range of Reynolds numbers from 0.1–120. The results indicate that the proposed three-split micromixer is efficient in mixing for a range of Reynolds numbers from 30–80. A parametric study was performed to determine the effects of the rhombic angle and sub-channel width ratio on mixing and pressure drop. Except at the lowest Reynolds number, a rhombic angle of 90° gave the best mixing performance. The three-split micromixer with minimum minor sub-channel widths provided the best mixing performance. View Full-Text
Keywords: Rhombic micromixer; Split-recombine micromixer; mixing index; Navier-Stokes equations Rhombic micromixer; Split-recombine micromixer; mixing index; Navier-Stokes equations
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hossain, S.; Kim, K.-Y. Mixing Analysis of Passive Micromixer with Unbalanced Three-Split Rhombic Sub-Channels. Micromachines 2014, 5, 913-928.

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