Acoustic resonances in microfluidic chips: full-image micro-PIV experiments and numerical simulations |
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Authors: | Hagsäter S M Jensen T Glasdam Bruus H Kutter J P |
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Institution: | MIC-Department of Micro and Nanotechnology, Technical University of Denmark, DTU Bldg. 345 east, DK-2800, Kongens Lyngby, Denmark. |
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Abstract: | We show that full-image micro-PIV analysis in combination with images of transient particle motion is a powerful tool for experimental studies of acoustic radiation forces and acoustic streaming in microfluidic chambers under piezo-actuation in the MHz range. The measured steady-state motion of both large 5 microm and small 1 microm particles can be understood in terms of the acoustic eigenmodes or standing ultra-sound waves in the given experimental microsystems. This interpretation is supported by numerical solutions of the corresponding acoustic wave equation. |
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