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Micromachines 2015, 6(8), 1166-1179;

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
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Yong Kweon Suh
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)
Full-Text   |   PDF [14243 KB, uploaded 18 August 2015]   |  


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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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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