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Characterization of the Mixing Quality in Micromixers

Aubin, Joelle and Fletcher, David F. and Bertrand, Joël and Xuereb, Catherine Characterization of the Mixing Quality in Micromixers. (2003) Chemical Engineering & Technology - CET, vol. 2 (n°12). pp. 1262-1270. ISSN 0930-7516

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Official URL: http://dx.doi.org/10.1002/ceat.200301848

Abstract

The laminar flow patterns and mixing performance of two different micromixers have been investigated and quantified using CFD. The micromixer geometries consist of a channel with either diagonal or asymmetric herringbone grooves on the channel floor. The numerical results show that a single helical flow is produced for the diagonal mixer, whereas the herringbone mixer creates a double helical flow, composed of an alternating large and small vortex. Particle tracking of a tracer shows that very little convective mixing occurs in the diagonal mixer. However, in the herringbone mixer, very good mixing occurs. Quantitative analysis methods that are traditionally used for characterizing macro-scale static mixers have been employed. Calculation of the variance of tracer dispersion and the stretching has shown to be well adapted for quantifying the mixing in the micromixers. However, methods based on the deformation rate appear to be less suitable. The results are in excellent agreement with previous experimental findings.

Item Type:Article
Additional Information:The definitive version is available at : http://www3.interscience.wiley.com/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University of Sydney (AUSTRALIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Joelle Aubin-cano
Deposited On:03 Feb 2009 12:37

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