Experimental and theoretical analysis of secondary Bjerknes forces between two bubbles in a standing wave
Jiao, J, He, Y, Kentish, SE, Ashokkumar, M, Manasseh, R and Lee, J (2015) Experimental and theoretical analysis of secondary Bjerknes forces between two bubbles in a standing wave Ultrasonics, 58. pp. 35-42.
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Bubbles in an acoustic field are affected by forces such as primary and secondary Bjerknes forces, which have been shown to be influenced by acoustic pressure, frequency, bubble size and separation distance between bubbles. However, such studies are predominantly theoretical, and are mostly focused on the sign reversal of the secondary Bjerknes force. This study provides experimental data on the effect of a range of bubble sizes (8-30 μm), distances (⩽0.2 mm), acoustic pressures (20-40 kPa) and frequencies (40-100 kHz) on the relative acceleration of two approaching bubbles. Under these conditions, only variations in the magnitude of the attractive force were observed. Using coupled equations of radial and translational motions, the acceleration and secondary Bjerknes force were calculated and compared to the experimental data. The variations in the magnitude of the secondary Bjerknes forces were explained by simulating bubble radius and coupled volume oscillation as a function of time.
|Divisions :||Faculty of Engineering and Physical Sciences > Chemical and Process Engineering|
|Date :||1 April 2015|
|Identification Number :||https://doi.org/10.1016/j.ultras.2014.11.016|
|Copyright Disclaimer :||Copyright © 2014 Elsevier B.V.|
|Uncontrolled Keywords :||Science & Technology, Technology, Life Sciences & Biomedicine, Acoustics, Radiology, Nuclear Medicine & Medical Imaging, Secondary Bjerknes force, Frequency, Pressure, Bubble size, Acceleration, GAS-BUBBLES, ACOUSTIC FIELD, SOUND FIELD, OSCILLATIONS, PRESSURE, DYNAMICS|
|Related URLs :|
|Depositing User :||Symplectic Elements|
|Date Deposited :||19 Jul 2016 13:54|
|Last Modified :||19 Jul 2016 13:54|
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