AI Article Synopsis
- - The study examines how air bubbles break apart in a sheared fluid flow and focuses on the acoustic emissions produced during this fragmenting process.
- - Though the pressure measured during fragmentation shows a lot of variability, the way energy is split between the resulting bubble pieces is consistently equal, regardless of their sizes.
- - The research proposes a model where the bubbles collapse symmetrically at their necks during fragmentation, effectively explaining both the pulse amplitude of the sound produced and the equal energy distribution among the fragments.
Article Abstract
An analysis of the acoustic emissions of air bubbles fragmenting in sheared fluid flow is presented. The fragmentation of bubbles into two products only is considered. While the measured pressure amplitude is highly variable, the partition of energy between fragmentation products is highly correlated. The partition of energy between products is, on average, approximately equal irrespective of the relative sizes of the bubble products. This observation suggests that the acoustic excitation mechanism is common to both bubbles immediately prior to fragmentation. A model for the excitation mechanism based on symmetric collapse of the neck of air joining fragmentation products is proposed and found to be sufficient to explain the range of observed bubble pulse amplitudes and the equal partition of energy.
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| http://dx.doi.org/10.1121/1.3003076 | DOI Listing |
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