期刊
ULTRASONICS SONOCHEMISTRY
卷 18, 期 1, 页码 431-435出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2010.07.013
关键词
Bubble; Cavitation; Shape oscillation
资金
- Ministry of Education, Singapore [T208A1238]
We report on an experimental study of the onset of surface oscillation and jetting of bubbles attached to a rigid surface. The driving frequency is 16.27 kHz and the radius of the spherical capped bubble is 160 +/- 5 mu m. The acoustic amplitude is increased from 0 to 0.085 bar while the oscillation is recorded with a high-speed camera at 180,000 frames/s over 8100 periods of oscillations. The radial and surface modes are analyzed from a Fourier decomposition. With increasing pressure amplitude we find three regimes: pure radial oscillation, development of surface oscillations, and a chaotic surface oscillation regime. These regimes appear abrupt and are repeatable. In the chaotic regime, fast liquid jetting towards the rigid surface is observed. (C) 2010 Elsevier B.V. All rights reserved.
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