Acoustic streaming produced by sharp-edge structures in microfluidic devices
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Author / Producer
Date
2020-05
Publication Type
Journal Article
ETH Bibliography
yes
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Abstract
The effect of acoustic streaming produced by sharp-edge structures is used in a variety of microfluidic applications, such as fluid mixing, pumping and particle manipulation. Since most investigations into this effect are experimental, there is a necessity in theoretical studies that could provide a deeper insight into the mechanism of the acoustic streaming and point out ways for optimizing acoustofluidic sharp-edge-based devices. In the present study, an analytical theory is developed that allows one to evaluate the velocity field of acoustic streaming generated at the apex of a wedge-shaped structure. Streamline patterns calculated by the developed theory show that the acoustic streaming is formed by two counterrotating vortices at the wedge apex. In addition to the analytical model, a numerical model is realized using the finite element method. Predictions of both models are described and compared with experimental observations.
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Publication status
published
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Journal / series
Volume
24 (5)
Pages / Article No.
32
Publisher
Springer
Event
Edition / version
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Software
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Date collected
Date created
Subject
Acoustofluidics; Acoustic streaming; Sharp-edge structures; Micromixing; Particle manipulation
Organisational unit
03307 - Dual, Jürg (emeritus) / Dual, Jürg (emeritus)
Notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.