scholarly journals Modeling and numerical simulation of the bubble cloud dynamics in an ultrasound field for burst wave lithotripsy

2018 ◽  
Vol 144 (3) ◽  
pp. 1780-1780
Author(s):  
Kazuki Maeda ◽  
Tim Colonius ◽  
Adam D. Maxwell ◽  
Wayne Kreider ◽  
Michael R. Bailey
Keyword(s):  
Numerical Simulation ◽  
Bubble Cloud ◽  
Ultrasound Field ◽  
Cloud Dynamics

scholarly journals Modeling and numerical simulation of the bubble cloud dynamics in an ultrasound field for burst wave lithotripsy

2018 ◽  
Author(s):  
Kazuki Maeda ◽  
Tim Colonius ◽  
Adam Maxwell ◽  
Wayne Kreider ◽  
Michael Bailey
Keyword(s):  
Numerical Simulation ◽  
Bubble Cloud ◽  
Ultrasound Field ◽  
Cloud Dynamics

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.

Numerical simulation of aberrated medical ultrasound signals

2018 ◽  
Vol 33 (5) ◽  
pp. 277-288 ◽  
Author(s):  
Katerina A. Beklemysheva ◽  
Georgiy K. Grigoriev ◽  
Nikolay S. Kulberg ◽  
Igor B. Petrov ◽  
Aleksey V. Vasyukov ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Ultrasound Examination ◽  
Transcranial Ultrasound ◽  
Medical Ultrasound ◽  
Ultrasound Field ◽  
Acoustic Equations ◽  
Ultrasound Signal ◽  
Ultrasound Signals ◽  
B Scan Images

Abstract Transcranial ultrasound examination is hampered by the skull which acts as an irregular aberrator of the ultrasound signal. Numerical recovery of the ultrasound field can help in elimination of aberrations induced by the skull. In this paper, we address the simulation of medical phantom scanning through silicon aberrators with wave notching. The numerical model is based on the 2D acoustic equations which are solved by the wavefront construction raytracing method. Numerical B-scan images are compared with experimental B-scan images.

scholarly journals Optical and acoustic monitoring of bubble cloud dynamics at a tissue-fluid interface in ultrasound tissue erosion

2007 ◽  
Vol 121 (4) ◽  
pp. 2421-2430 ◽  
Author(s):  
Zhen Xu ◽  
Timothy L. Hall ◽  
J. Brian Fowlkes ◽  
Charles A. Cain
Keyword(s):  
Acoustic Monitoring ◽  
Tissue Fluid ◽  
Fluid Interface ◽  
Bubble Cloud ◽  
Cloud Dynamics

Shock‐controlled bubble cloud dynamics and light emission.

2011 ◽  
Vol 129 (4) ◽  
pp. 2619-2619 ◽  
Author(s):  
R. Glynn Holt ◽  
Phillip A. Anderson ◽  
Ashwinkumar Sampathkumar ◽  
Jonathan R. Sukovich ◽  
D. Felipe Gaitan
Keyword(s):  
Light Emission ◽  
Bubble Cloud ◽  
Cloud Dynamics

Numerical study on nonlinear behavior of a collapsing bubble cloud in an ultrasound field

2006 ◽  
Vol 119 (5) ◽  
pp. 3408-3408
Author(s):  
Shin Yoshizawa ◽  
Teiichiro Ikeda ◽  
Shu Takagi ◽  
Yoichiro Matsumoto
Keyword(s):  
Numerical Study ◽  
Nonlinear Behavior ◽  
Bubble Cloud ◽  
Ultrasound Field
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