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Proceedings Paper

Passive micromixer with break-up obstructions
Author(s): Ali Asgar S. Bhagat; Erik T. K. Peterson; Ian Papautsky
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Paper Abstract

In this paper, we report on design and fabrication of a passive microfluidic mixer capable of mixing at low Reynolds numbers (Re). Passive mixers typically use channel geometry to mix fluids, and many previously reported designs that work only at moderate to high Reynolds numbers and are often difficult to fabricate. Our design uses diamond-shaped obstructions inside the microchannel to break up and laminate the flow, thus enhancing mixing. Both numerical and experimental studies show that the mixer is efficient at mixing fluids at low Reynolds numbers. We benchmarked our mixer design against a conventional T-mixer. Results show that the new design exhibits rapid mixing at Re < 0.1. The new mixer has a planar design which is easy to fabricate and thus will benefit a wide range of lab-on-a-chip applications.

Paper Details

Date Published: 23 January 2006
PDF: 10 pages
Proc. SPIE 6112, Microfluidics, BioMEMS, and Medical Microsystems IV, 61120J (23 January 2006); doi: 10.1117/12.648150
Show Author Affiliations
Ali Asgar S. Bhagat, Univ. of Cincinnati (United States)
Erik T. K. Peterson, Univ. of Cincinnati (United States)
Ian Papautsky, Univ. of Cincinnati (United States)

Published in SPIE Proceedings Vol. 6112:
Microfluidics, BioMEMS, and Medical Microsystems IV
Ian Papautsky; Wanjun Wang, Editor(s)

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