Issue 3, 2007
From the journal:

Lab on a Chip

An ultrashort mixing length micromixer: The shear superposition micromixer

Frédéric Bottausci,a   Caroline Cardonne,a   Carl Meinharta  and  Igor Mezića  

a Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, CA 93106, USA

Abstract

We report for the first time a laminar high-performance continuous micromixing process of two fluids over a length of 200 microns in under 10 milliseconds achieved by an optimization of the control parameters amplitude and frequency in the mixing device denoted as ‘Shear Superposition Micromixer’. We improve mixing time by approximately 5 orders of magnitude over diffusion-limited mixing. The data indicate that rapid mixing is a result of the combined action of Taylor–Aris dispersion in the main and secondary microchannels and unsteady vortex motion that occurs at finite Reynolds number, which occurs above a threshold amplitude and frequency. The mixing performance is quantified using micron-resolution particle image velocimetry (micro-PIV) and computational fluid dynamics (CFD) simulations.

Graphical abstract: An ultrashort mixing length micromixer: The shear superposition micromixer

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Article information

DOI
https://doi.org/10.1039/B616104A
Article type
Technical Note
Submitted
06 Nov 2006
Accepted
17 Nov 2006
First published
21 Dec 2006

Lab Chip, 2007,7, 396-398

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An ultrashort mixing length micromixer: The shear superposition micromixer

F. Bottausci, C. Cardonne, C. Meinhart and I. Mezić, Lab Chip, 2007, 7, 396 DOI: 10.1039/B616104A

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