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Open AccessArticle

Comparative Analysis of Passive Micromixers at a Wide Range of Reynolds Numbers

Department of Mechanical and Aerospace Engineering (DIMEAS), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Yong Kweon Suh
Micromachines 2015, 6(8), 1166-1179; https://doi.org/10.3390/mi6081166
Received: 30 June 2015 / Revised: 5 August 2015 / Accepted: 5 August 2015 / Published: 18 August 2015
(This article belongs to the Special Issue Micromixer & Micromixing)
Two novel passive micromixers, denoted as the Y-Y mixer and the H-C mixer, based on split-and-recombine (SAR) principle are studied both experimentally and numerically over Reynolds numbers ranging from 1 to 100. An image analysis technique was used to evaluate mixture homogeneity at four target areas. Numerical simulations were found to be a useful support for the design phase, since a general idea of mixing of fluids can be inferred from the segregation or the distribution of path lines. Comparison with a well-known mixer, the Tear-drop one, was also performed. Over the examined range of Reynolds numbers 1 ≤ Re ≤ 100, the Y-Y and H-C mixers showed at their exit an almost flat mixing index characteristic, with a mixing efficiency higher than 90%; conversely the Tear-drop mixer showed a relevant decrease of efficiency at mid-range. Furthermore, the Y-Y and the H-C showed significantly less pressure drop than the Tear-drop mixer. View Full-Text
Keywords: micromixer; numerical simulation; split-and-recombine principle; mixing efficiency micromixer; numerical simulation; split-and-recombine principle; mixing efficiency
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MDPI and ACS Style

Viktorov, V.; Mahmud, M.R.; Visconte, C. Comparative Analysis of Passive Micromixers at a Wide Range of Reynolds Numbers. Micromachines 2015, 6, 1166-1179.

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