Journal
ULTRASONICS SONOCHEMISTRY
Volume 29, Issue -, Pages 129-145Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2015.08.022
Keywords
The secondary Bjerknes force; Gas bubbles; Acoustic cavitation; Dual-frequency excitation
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Funding
- China Scholarship Council
- University of Warwick
- EPSRC WIMRC [RESCM 9219]
- Fundamental Research Funds for the Central Universities [2014ZD09]
- National Natural Science Foundation of China [51506051]
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The secondary Bjerknes force is one of the essential mechanisms of mutual interactions between bubbles oscillating in a sound field. The dual-frequency acoustic excitation has been applied in several fields such as sonochemistry, biomedicine and material engineering. In this paper, the secondary Bjerknes force under dual-frequency excitation is investigated both analytically and numerically within a large parameter zone. The unique characteristics (i.e., the complicated patterns of the parameter zone for sign change and the combination resonances) of the secondary Bjerknes force under dual-frequency excitation are revealed. Moreover, the influence of several parameters (e.g., the pressure amplitude, the bubble distance and the phase difference between sound waves) on the secondary Bjerknes force is also investigated numerically. (C) 2015 Elsevier B.V. All rights reserved.
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