scholarly journals Numerical study of a laser generated cavitation bubble based on FVM and CLSVOF method

2019 ◽  
Vol 240 ◽  
pp. 072021 ◽  
Author(s):  
Jianyong Yin ◽  
Yongxue Zhang ◽  
Yuning Zhang
Keyword(s):  
Cavitation Bubble ◽  
Numerical Study

Numerical Study on the Growth and Collapse of a Cavitation Bubble inside a Rigid Cylinder with a Compliant Coating

2014 ◽  
Vol 875-877 ◽  
pp. 1194-1198
Author(s):  
Fardin Rouzbahani ◽  
M.T. Shervani-Tabar
Keyword(s):  
Integral Equation ◽  
Boundary Integral Equation ◽  
Cavitation Bubble ◽  
Numerical Study ◽  
Finite Difference Methods ◽  
Life Time ◽  
Integral Equation Method ◽  
Boundary Integral ◽  
Compliant Coating ◽  
Rigid Cylinder

In this paper, growth and collapse of a cavitation bubble inside a rigid cylinder with a compliant coating (a model of humans vessels) is studied using Boundary Integral Equation and Finite Difference Methods. The fluid flow is treated as a potential flow and Boundary Integral Equation Method is used to solve Laplaces equation for velocity potential. The compliant coating is modeled as a membrane with a spring foundation. The effects of the parameters describing the flow and the parameters describing the compliant coating on the interaction between the fluid and the cylindrical compliant coating are shown throughout the numerical results. It is shown that by increasing the compliancy of the coating, the bubble life time is decreased and the mass per unit area has an important role in bubble behavior.

scholarly journals A Numerical Study of the Formation of a Conical Cavitation Bubble Structure at Low Ultrasonic Frequency

2015 ◽  
Vol 70 ◽  
pp. 1070-1073 ◽  
Author(s):  
C. Vanhille ◽  
C. Campos-Pozuelo ◽  
C. Granger ◽  
B. Dubus
Keyword(s):  
Cavitation Bubble ◽  
Numerical Study ◽  
Ultrasonic Frequency ◽  
Bubble Structure

scholarly journals The collapse of a cavitation bubble in shear flows—A numerical study

1995 ◽  
Vol 7 (11) ◽  
pp. 2608-2616 ◽  
Author(s):  
Po‐Wen Yu ◽  
Steven L. Ceccio ◽  
Grétar Tryggvason
Keyword(s):  
Cavitation Bubble ◽  
Shear Flows ◽  
Numerical Study

Numerical Study of Gas and Cavitation Bubble Dynamics in Liquid Mercury Under Negative Pressure

2007 ◽  
Author(s):  
Masato Ida ◽  
Takashi Naoe ◽  
Masatoshi Futakawa
Keyword(s):  
Cavitation Bubble ◽  
Bubble Dynamics ◽  
Numerical Study ◽  
Gas Bubbles ◽  
Proton Accelerator ◽  
Positive Pressure ◽  
Nuclear Facilities ◽  
Cavitation Inception ◽  
Liquid Mercury ◽  
Numerical Studies

Gas and cavitation bubble dynamics have been studied numerically to evaluate the effect of gas bubble injection on the suppression of cavitation inception. In our previous studies it has been demonstrated by direct observation that cavitation occurs in liquid mercury when mechanical impacts are imposed and it must seriously shorten the lifetime of nuclear facilities using liquid mercury, such as the mercury spallation target of the J-PARC (Japan Proton Accelerator Research Complex). In this paper, using single-bubble and multibubble models we have performed numerical studies on the dynamics of cavitation bubbles in liquid mercury with and without preexisting gas bubbles, and have clarified that if the mercury involves gas bubbles much larger than the cavitation nuclei, cavitation inception is effectively suppressed due to the positive pressure radiated by the gas bubbles. Our recent experimental results (not shown in the present paper) have confirmed the effectiveness of the bubble injection.

EFFECT OF GAS CONTENT ON THE OSCILLATION OF A LASER-INDUCED CAVITATION BUBBLE

2007 ◽  
Vol 21 (16) ◽  
pp. 997-1006
Author(s):  
X. CHEN ◽  
R. Q. XU ◽  
B. YANG ◽  
J. LU ◽  
X. W. NI
Keyword(s):  
Cavitation Bubble ◽  
Numerical Study ◽  
Fiber Optic Sensor ◽  
Gas Content ◽  
Beam Deflection ◽  
Bubble Motion ◽  
Cavitation Model ◽  
Optic Sensor ◽  
Temporal Oscillation ◽  
Maximum Minimum

The oscillation of a cavitation bubble and the effect of gas content inside a cavity on the bubble motion are investigated by theory and experiment. Based on the cavitation model, the numerical study yields the gas content dependence of the amplitude and duration of the bubble oscillation in liquids. In experiment, the temporal oscillation of a single laser-induced cavitation bubble is obtained by means of a sensitive fiber-optic sensor based on optical beam deflection. The characteristic bubble parameters are determined, including the maximum (minimum) radii, oscillation duration and bubble energy, which all decrease with the oscillation. Besides, combining the cavitation theory with experimental data, the variation of gas content within the bubble during each oscillation is estimated, which increases with the oscillation cycle. Our results reveal the competitive interplay of the bubble energy and gas content during the bubble motion and the bubble energy in effect outweighs the latter.

scholarly journals Numerical Study of Liquid Fuel / Cavitation Bubble Mixture Injection Technique

2012 ◽  
Vol 78 (793) ◽  
pp. 1584-1597
Author(s):  
Ryo MASUDA ◽  
Kiyomi KAWAMURA ◽  
Makoto NAGAOKA ◽  
Masahiko MASUBUCHI ◽  
Keisuke KOMORI
Keyword(s):  
Cavitation Bubble ◽  
Liquid Fuel ◽  
Numerical Study ◽  
Injection Technique ◽  
Bubble Mixture

An Investigation on the Behavior of Laser Induced Bubble in Cryogenic Liquid Nitrogen

1996 ◽  
Vol 118 (4) ◽  
pp. 850-856 ◽  
Author(s):  
Hitoshi Sato ◽  
Xiao Wu Sun ◽  
Mamoru Odagawa ◽  
Kazuo Maeno ◽  
Hiroki Honma
Keyword(s):  
Liquid Nitrogen ◽  
Cavitation Bubble ◽  
Ruby Laser ◽  
Numerical Study ◽  
Cryogenic Liquid ◽  
Image Converter ◽  
Power Laser ◽  
Two Phase ◽  
Spherical Bubble ◽  
Production Growth

There have been few experimental reports on cryogenic two-phase fluids and cavitation phenomena using the irradiation of pulsed high-power laser. This paper describes an investigation of the behavior of laser induced cavitation bubble in cryogenic liquid nitrogen. The bubble is produced by a pulsed ruby laser focused in the special cryostat. The production, growth, and rebound phenomena of the bubbles are visualized by diffusive shadowgraph technique with an image-converter camera. To compare with the experimental results, a numerical study has also been performed on the dynamics of a single spherical bubble in liquid nitrogen under the conditions of nonequilibrium phase change.

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