Journal
ULTRASONICS SONOCHEMISTRY
Volume 78, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2021.105734
Keywords
Acoustic cavitation bubble; Ultrasound; Volume of fluid method; OpenFOAM; Acoustic wake effect; Multi-bubble system
Categories
Funding
- JSPS KAKENHI [JP20K15079, JP17K18969]
- Collaborative Research Program for Young Scientists of ACCMS, Kyoto University
- Collaborative Research Program for Young Scientists of IIMV, Kyoto University
Ask authors/readers for more resources
The study numerically investigated the dynamic behavior of cavitation bubbles in multi-bubble systems, revealing that the oscillation amplitude of a cavitation bubble surrounded by other bubbles becomes larger due to the acoustic wake effect.
Acoustic cavitation occurs in ultrasonic treatment causing various phenomena such as chemical synthesis, chemical decomposition, and emulsification. Nonlinear oscillations of cavitation bubbles are assumed to be responsible for these phenomena, and the neighboring bubbles may interact each other. In the present study, we numerically investigated the dynamic behavior of cavitation bubbles in multi-bubble systems. The results reveal that the oscillation amplitude of a cavitation bubble surrounded by other bubbles in a multi-bubble system becomes larger compared with that in the single-bubble case. It is found that this is caused by an acoustic wake effect, which reduces the pressure near a bubble surrounded by other bubbles and increases the time delay between the bubble contraction/expansion cycles and sound pressure oscillations. A new parameter, called cover ratio is introduced to quantitatively evaluate the variation in the bubble oscillation amplitude, the time delay, and the maximum bubble radius.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available