Cavitation-induced shock wave behaviour in different liquids

Journal article


Khavari, M., Priyadarshi, A., Morton, J., Porfyrakis, K., Pericleous, K., Eskin, D. and Tzanakis, T. 2023. Cavitation-induced shock wave behaviour in different liquids. Ultrasonics Sonochemistry. 94, pp. 1-11. https://doi.org/10.1016/j.ultsonch.2023.106328
AuthorsKhavari, M., Priyadarshi, A., Morton, J., Porfyrakis, K., Pericleous, K., Eskin, D. and Tzanakis, T.
Abstract

This paper follows our earlier work where a strong high frequency pressure peak has been observed as a consequence of the formation of shock waves due to the collapse of cavitation bubbles in water, excited by an ultrasonic source at 24 kHz. We study here the effects of liquid physical properties on the shock wave characteristics by replacing water as the medium successively with ethanol, glycerol and finally a 1:1 ethanol–water solution. The pressure frequency spectra obtained in our experiments (from more than 1.5 million cavitation collapsing events) show that the expected prominent shockwave pressure peak was barely detected for ethanol and glycerol, particularly at low input powers, but was consistently observed for the 1:1 ethanol–water solution as well as in water, with a slight shift in peak frequency for the solution. We also report two distinct features of shock waves in raising the frequency peak at MHz (inherent) and contributing to the raising of sub-harmonics (periodic). Empirically constructed acoustic pressure maps revealed significantly higher overall pressure amplitudes for the ethanol–water solution than for other liquids. Furthermore, a qualitative analysis revealed that mist-like patterns are developed in ethanol–water solution leading to higher pressures.

KeywordsUltrasonic; cavitation Shock ; sub-harmonics
Year2023
JournalUltrasonics Sonochemistry
Journal citation94, pp. 1-11
PublisherElsevier
ISSN1350-4177
Digital Object Identifier (DOI)https://doi.org/10.1016/j.ultsonch.2023.106328
Web address (URL)https://www.sciencedirect.com/science/article/pii/S1350417723000408
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Output statusPublished
Publication dates
Online14 Feb 2023
Publication process dates
Accepted09 Feb 2023
Deposited26 Apr 2023
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