Analysis of sound pressure levels generated by nozzle-emitted large bubbles.

The sound radiated by newly formed bubbles can be used to determine their properties. However, details of the fluid dynamics driving the acoustic emission remain unclear. A neck-collapsing model has been proposed to explain the sound generation at bubble pinch-off. The model uses a forcing function which drives the Rayleigh-Plesset equation and is linked to the bubble acoustic pressure. Here, the model is tested on bubbles of diameter up to 7 mm generated in distilled water, tap water, and alcohol-water solution. The model works well for bubbles less than 2.2 mm radius but the error increases up to 71% for larger diameters.

Citation

Filippo Nelli, Grant Deane, Andrew Ooi, Richard Manasseh. Analysis of sound pressure levels generated by nozzle-emitted large bubbles. JASA express letters. 2022 May;2(5):054002

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PMID: 36154060

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