The ubiquitous acoustic bubble: a brief introduction

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• Professor Ronald Roy (University of Oxford)
• Friday 17 February 2023, 12:45-13:45
• LR5.

If you have a question about this talk, please contact Nirmani Rathnayake.

There are few objects in nature that interact with acoustic waves as effectively and efficiently as a gas bubble in a liquid. The velocity, intensity and even frequency content of sound waves are profoundly impacted by bubbles in suspension, and when high-pressure waves travel through a liquid medium, they nucleate small gas bubbles that subsequently respond to period acoustic forcing, a process known as acoustic cavitation. Cavitation bubbles convert acoustical energy to mechanical energy that is highly concentrated in both space and time. The result is a plethora of mechanical, and thermal effects, ranging from acoustic micro-streaming to extreme conditions at the point of cavity collapse. All of these effects play a role, to varying degrees, in a broad range of industrial and biomedical procedures involving ultrasound. In this talk, we present an introductory overview of the relevant bubble physics, physical effects, and the roles – both beneficial and detrimental – played by bubbles and cavitation in industrial and medical acoustics.

This talk is part of the Fluids Group Seminar (CUED) series.

This talk is included in these lists:

• Acoustics Lab Seminars
• Engineering Department Acoustics/Combustion Student seminars
• Fluids Group Seminar (CUED)
• LR5

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