Single Bubble Collapse at Audible Frequencies and High Amplitudes

Davide Masiello, Ignacio Tudela, Rama Govindarajan, Rajaram Nityananda, Prashant Valluri

Research output: Contribution to conferenceAbstractpeer-review

Abstract

While the characteristics of bubbles' radial motion have been widely studied for driving frequencies higher than 20 kHz, lower frequency ranges remain unexplored. In this work, dynamics of an acoustically forced gas/vapor single micro-bubble in water have been studied for driving frequencies below 20 kHz by means of a reduced-order model accounting for all the critical thermo-mechanical contributions. Our investigations in a large parameter space (frequency x amplitude =[1-100 kHz] x [1-7.5 atm]) suggest that at low frequencies and/or high amplitudes, water phase-change and vapor segregation play a key role in slowing down the dynamics, yielding a remarkably different behavior where the first collapse is not necessarily the strongest one (which is the case for higher frequencies). However, at moderate amplitudes (1-1.1 atm), low frequency forcing yields bubble dynamics comparable to the high-frequency/high-amplitude cases.

*This project is co-funded by ThermaSMART under the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 778104

Original languageEnglish
Publication statusPublished - Nov 2019
Event72nd Annual Meeting of the APS Division of Fluid Dynamics - Washington State Convention Center, Seattle, United States
Duration: 23 Nov 201926 Nov 2019
https://www.apsdfd2019.org/

Conference

Conference72nd Annual Meeting of the APS Division of Fluid Dynamics
CountryUnited States
CitySeattle
Period23/11/1926/11/19
Internet address

Fingerprint Dive into the research topics of 'Single Bubble Collapse at Audible Frequencies and High Amplitudes'. Together they form a unique fingerprint.

Cite this