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Title: Vertical vibration and shape oscillation of acoustically levitated water drops

We present the vertical harmonic vibration of levitated water drops within ultrasound field. The restoring force to maintain such a vibration mode is provided by the resultant force of acoustic radiation force and drop gravity. Experiments reveal that the vibration frequency increases with the aspect ratio for drops with the same volume, which agrees with the theoretical prediction for those cases of nearly equiaxed drops. During the vertical vibration, the floating drops undergo the second order shape oscillation. The shape oscillation frequency is determined to be twice the vibration frequency.
Authors:
; ; ;  [1]
  1. Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072 (China)
Publication Date:
OSTI Identifier:
22311341
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASPECT RATIO; DROPLETS; FORECASTING; GRAVITATION; LEVITATION; OSCILLATION MODES; OSCILLATIONS; WATER