Microfluidic mixing via acoustically driven chaotic advection

Mixing presents a notoriously difficult problem in small amounts of fluids. Herein, surface acoustic waves provide a convenient technique to generate time-dependent flow patterns. These flow patterns can be optimized in such a way that advected particles are mixed most efficiently in the fluid withi...

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Bibliographic Details
Published in:Physical review letters 2008-01, Vol.100 (3), p.034502-034502, Article 034502
Main Authors: Frommelt, Thomas, Kostur, Marcin, Wenzel-Schäfer, Melanie, Talkner, Peter, Hänggi, Peter, Wixforth, Achim
Format: Article
Language:English
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Summary:Mixing presents a notoriously difficult problem in small amounts of fluids. Herein, surface acoustic waves provide a convenient technique to generate time-dependent flow patterns. These flow patterns can be optimized in such a way that advected particles are mixed most efficiently in the fluid within a short time compared to the time pure diffusion would take. Investigations are presented for the mixing efficiency of a flat cylinder that is driven by two surface acoustic waves. The experimental results favorably agree with model calculations of the flow patterns and the advective transport.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.100.034502