Microfluidic mixing via acoustically driven chaotic advection |
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Authors: | Frommelt Thomas Kostur Marcin Wenzel-Schäfer Melanie Talkner Peter Hänggi Peter Wixforth Achim |
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Affiliation: | Universit?t Augsburg, Institut für Physik, Universit?tsstrasse 1, D-86135 Augsburg, Germany. |
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Abstract: | 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. |
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