Observation of the growth of cavitation bubble cloud by the backscattering of focused ultrasound from a laser-induced bubble

2017 ◽  
Author(s):  
T. Horiba ◽  
T. Sano ◽  
T. Ogasawara ◽  
H. Takahira
Keyword(s):  
Cavitation Bubble ◽  
Focused Ultrasound ◽  
Bubble Cloud

scholarly journals Measurement of the Local Pressure near a Cavitation Bubble Cloud Formed by the Focused Ultrasound

2018 ◽  
Vol 32 (1) ◽  
pp. 49-58
Author(s):  
Taisei HORIBA ◽  
Taisuke SANO ◽  
Toshiyuki OGASAWARA ◽  
Hiroyuki TAKAHIRA
Keyword(s):  
Cavitation Bubble ◽  
Focused Ultrasound ◽  
Local Pressure ◽  
Bubble Cloud

scholarly journals Cavitation Bubble Cloud Break-Off Mechanisms at Micro-Channels

Fluids ◽  
2021 ◽  
Vol 6 (6) ◽  
pp. 215
Author(s):  
Paul McGinn ◽  
Daniel Pearce ◽  
Yannis Hardalupas ◽  
Alex Taylor ◽  
Konstantina Vogiatzaki
Keyword(s):  
Cavitation Bubble ◽  
Cavitation Inception ◽  
Wave Dynamics ◽  
Bubble Cloud ◽  
Cloud Dynamics ◽  
Micro Channels ◽  
Physical Insight ◽  
Cloud Process ◽  
Good Agreement

This paper provides new physical insight into the coupling between flow dynamics and cavitation bubble cloud behaviour at conditions relevant to both cavitation inception and the more complex phenomenon of flow “choking” using a multiphase compressible framework. Understanding the cavitation bubble cloud process and the parameters that determine its break-off frequency is important for control of phenomena such as structure vibration and erosion. Initially, the role of the pressure waves in the flow development is investigated. We highlight the differences between “physical” and “artificial” numerical waves by comparing cases with different boundary and differencing schemes. We analyse in detail the prediction of the coupling of flow and cavitation dynamics in a micro-channel 20 m high containing Diesel at pressure differences 7 MPa and 8.5 MPa, corresponding to cavitation inception and "choking" conditions respectively. The results have a very good agreement with experimental data and demonstrate that pressure wave dynamics, rather than the “re-entrant jet dynamics” suggested by previous studies, determine the characteristics of the bubble cloud dynamics under “choking” conditions.

Pressure measurement and high-speed observation on the cavitation bubble cloud due to the backscattering of HIFU from a laser-induced bubble

2018 ◽  
Vol 50 (6) ◽  
pp. 065512 ◽  
Author(s):  
Toshiyuki Ogasawara ◽  
Taisei Horiba ◽  
Taisuke Sano ◽  
Hiroyuki Takahira
Keyword(s):  
Pressure Measurement ◽  
Cavitation Bubble ◽  
High Speed ◽  
Bubble Cloud

Measurement of pressure produced at a solid surface by an acoustically driven cavitation bubble cloud

2006 ◽  
Vol 119 (5) ◽  
pp. 3408-3408
Author(s):  
Teiichiro Ikeda ◽  
Shin Yoshizawa ◽  
Yoichiro Matsumoto ◽  
Michael R. Bailey ◽  
Lawrence A. Crum ◽  
...  
Keyword(s):  
Solid Surface ◽  
Cavitation Bubble ◽  
Bubble Cloud
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