TY - JOUR
T1 - Enhancement of oscillation amplitude of cavitation bubble due to acoustic wake effect in multibubble environment
AU - Yamamoto, Takuya
AU - Komarov, Sergey V.
N1 - Funding Information:
The present research is supported partly by JSPS KAKENHI, Grant-in-Aid for Young Scientists Grant Number JP20K15079 and Grant-in-Aid for Challenging Exploratory Research Grant Number JP17K18969, and partly by Collaborative Research Program for Young Scientists of ACCMS and IIMV, Kyoto University.
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/10
Y1 - 2021/10
N2 - 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.
AB - 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.
KW - Acoustic cavitation bubble
KW - Acoustic wake effect
KW - Multi-bubble system
KW - OpenFOAM
KW - Ultrasound
KW - Volume of fluid method
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U2 - 10.1016/j.ultsonch.2021.105734
DO - 10.1016/j.ultsonch.2021.105734
M3 - Article
C2 - 34469851
AN - SCOPUS:85113786587
VL - 78
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
SN - 1350-4177
M1 - 105734
ER -