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

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.

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

Physics Procedia ◽

10.1016/j.phpro.2015.08.228 ◽

2015 ◽

Vol 70 ◽

pp. 1070-1073 ◽

Cited By ~ 2

Author(s):

C. Vanhille ◽

C. Campos-Pozuelo ◽

C. Granger ◽

B. Dubus

Keyword(s):

Cavitation Bubble ◽

Numerical Study ◽

Ultrasonic Frequency ◽

Bubble Structure

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Numerical study of unsteady, thermally-stratified shear flows in superposed porous and pure-fluid domains

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2016.01.056 ◽

2016 ◽

Vol 96 ◽

pp. 643-659 ◽

Cited By ~ 6

Author(s):

Panagiotis D. Antoniadis ◽

Miltiadis V. Papalexandris

Keyword(s):

Shear Flows ◽

Numerical Study ◽

Pure Fluid

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Transition in Homogeneously Heated Inclined Plane Parallel Shear Flows

Journal of Heat Transfer ◽

10.1115/1.1599370 ◽

2003 ◽

Vol 125 (5) ◽

pp. 795-803 ◽

Cited By ~ 8

Author(s):

S. Generalis ◽

M. Nagata

Keyword(s):

Shear Flows ◽

Numerical Study ◽

Fluid Layer ◽

Travelling Wave ◽

Inclined Plane ◽

Vertical Orientation ◽

Plane Parallel ◽

Wide Range ◽

Parallel Shear Flows ◽

Roll Type

The transition of internally heated inclined plane parallel shear flows is examined numerically for the case of finite values of the Prandtl number Pr. We show that as the strength of the homogeneously distributed heat source is increased the basic flow loses stability to two-dimensional perturbations of the transverse roll type in a Hopf bifurcation for the vertical orientation of the fluid layer, whereas perturbations of the longitudinal roll type are most dangerous for a wide range of the value of the angle of inclination. In the case of the horizontal inclination transverse roll and longitudinal roll perturbations share the responsibility for the prime instability. Following the linear stability analysis for the general inclination of the fluid layer our attention is focused on a numerical study of the finite amplitude secondary travelling-wave solutions (TW) that develop from the perturbations of the transverse roll type for the vertical inclination of the fluid layer. The stability of the secondary TW against three-dimensional perturbations is also examined and our study shows that for Pr=0.71 the secondary instability sets in as a quasi-periodic mode, while for Pr=7 it is phase-locked to the secondary TW. The present study complements and extends the recent study by Nagata and Generalis (2002) in the case of vertical inclination for Pr=0.

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

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/240/7/072021 ◽

2019 ◽

Vol 240 ◽

pp. 072021 ◽

Cited By ~ 1

Author(s):

Jianyong Yin ◽

Yongxue Zhang ◽

Yuning Zhang

Keyword(s):

Cavitation Bubble ◽

Numerical Study

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A numerical study of mixing control in spatially evolving shear flows

10.2514/6.1989-977 ◽

1989 ◽

Cited By ~ 3

Author(s):

F. GRINSTEIN ◽

F. HUSSAIN ◽

E. ORAN

Keyword(s):

Shear Flows ◽

Numerical Study ◽

Mixing Control

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Numerical study of polymer tumbling in linear shear flows

Physica D Nonlinear Phenomena ◽

10.1016/j.physd.2005.07.016 ◽

2005 ◽

Vol 211 (1-2) ◽

pp. 9-22 ◽

Cited By ~ 36

Author(s):

A. Puliafito ◽

K. Turitsyn

Keyword(s):

Shear Flows ◽

Numerical Study ◽

Linear Shear

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

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2007-37297 ◽

2007 ◽

Cited By ~ 1

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.

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