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Issue 24, 2011
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Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization

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Abstract

We present a platform for micro particle image velocimetry (μPIV), capable of carrying out full-channel, temperature-controlled, long-term-stable, and automated μPIV-measurement of microchannel acoustophoresis with uncertainties below 5% and a spatial resolution in the order of 20 μm. A method to determine optimal μPIV-settings for obtaining high-quality results of the spatially inhomogeneous acoustophoretic velocity fields of large dynamical range is presented. In particular we study the dependence of the results on the μPIV interrogation window size and the number of repeated experiments. The μPIV-method was further verified by comparing it with our previously published particle tracking method. Using the μPIV platform we present a series of high-resolution measurements of the acoustophoretic velocity field as a function of the driving frequency, the driving voltage, and the resonator temperature. Finally, we establish a direct and consistent connection between the obtained acoustophoretic velocity fields, and continuous flow mode acoustophoresis, commonly used in applications.

Graphical abstract: Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization

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Article information


Submitted
15 Jul 2011
Accepted
14 Sep 2011
First published
12 Oct 2011

Lab Chip, 2011,11, 4152-4164
Article type
Paper

Automated and temperature-controlled micro-PIV measurements enabling long-term-stable microchannel acoustophoresis characterization

P. Augustsson, R. Barnkob, S. T. Wereley, H. Bruus and T. Laurell, Lab Chip, 2011, 11, 4152
DOI: 10.1039/C1LC20637K

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