Magnitude and variance of acoustic energy density in microchannel acoustophoresis: Comparison between single-frequency and frequency-modulated actuation
2013 (English)In: 17th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2013, 2013, Vol. 3, 1400-1402 p.Conference paper (Refereed)
Using a novel light-intensity method, we quantify for the first time the magnitude and spatial variance in acoustic energy density along a microchannel during acoustophoretic focusing of particles with frequency-modulated ultrasound. We compare the distribution in energy density between single-frequency (SF) and frequency-modulation (FM) actuation along the microchannel. In addition, we analyze the field uniformity for the two actuation approaches (SF and FM) by measuring the deviation of the final particle pattern from an ideal straight line. We conclude that the magnitude of the energy density for FM actuation is of the same order of magnitude as for SF actuation, but with much less spatial variance.
Place, publisher, year, edition, pages
2013. Vol. 3, 1400-1402 p.
Acoustic energy density, Acoustophoresis, Frequency modulation, Microchannel
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-168793ScopusID: 2-s2.0-84907311740ISBN: 978-163266624-6OAI: oai:DiVA.org:kth-168793DiVA: diva2:819707
17th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2013; Freiburg; Germany
QC 201506112015-06-112015-06-092015-06-11Bibliographically approved