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Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Apr;81(4 Pt 2):046305. Epub 2010 Apr 9.

Parametrically excited sectorial oscillation of liquid drops floating in ultrasound.

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1
Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China.

Abstract

We report experiments in which the nonaxisymmetric sectorial oscillations of water drops have been excited using acoustic levitation and an active modulation method. The observed stable sectorial oscillations are up to the seventh mode. These oscillations are excited by parametric resonance. The oblate initial shape of the water drops is essential to this kind of excitations. The oscillation frequency increases with mode number but decreases with equatorial radius for each mode number. The data can be well described by a modified Rayleigh equation, without the use of additional parameters.

PMID:
20481825
DOI:
10.1103/PhysRevE.81.046305
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