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Fundamentals of CavitationFurther Insights into Bubble Physics

Fundamentals of Cavitation: Further Insights into Bubble Physics 5. FURTHER INSIGHTS INTO BUBBLE PHYSICS The dynamics of cavitation bubbles is controlled mainly by inertia and pressure forces, as analysed in chapters 3 and 4. However, other physical phenomena may also have a non-negligible influence on their growth and collapse. These include: ® Liquid compressibility which affects the final stages of bubble collapse and causes the emission of shock waves and/or acoustic waves, essential in cavitation noise and erosion. ® Heat transfer between the entrapped gas and the surrounding liquid, which is decisive with regard to the phenomenon of sonoluminescence, i.e. light emission by collapsing bubbles, as it controls the temperature reached inside the bubble at the end of the collapse. ® Vaporization, which requires heat transfer and consequently temperature gradients between the liquid and the bubble and which is the cause of thermal delay in cavitation. This phenomenon is currently referred to as the thermo- dynamic effect. The present chapter is devoted to the presentation of the fundamental ideas and classical results concerning these problems. More detailed analyses can be found in books dedicated to specialized aspects, for example LAUTERBORN (1979), TREVENA (1987), LEIGHTON (1994). 5.1. THE EFFECT OF COMPRESSIBILITY 5.1.1. TAIT'S EQUATION OF STATE In order http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Fundamentals of CavitationFurther Insights into Bubble Physics

Part of the Fluid Mechanics and Its Applications Book Series (volume 76)
Fundamentals of Cavitation — Jan 1, 2005
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Publisher
Springer Netherlands
Copyright
© Springer Science + Business Media, Inc. 2005
ISBN
978-1-4020-2232-6
Pages
77 –96
DOI
10.1007/1-4020-2233-6_5
Publisher site
See Chapter on Publisher Site

Abstract

5. FURTHER INSIGHTS INTO BUBBLE PHYSICS The dynamics of cavitation bubbles is controlled mainly by inertia and pressure forces, as analysed in chapters 3 and 4. However, other physical phenomena may also have a non-negligible influence on their growth and collapse. These include: ® Liquid compressibility which affects the final stages of bubble collapse and causes the emission of shock waves and/or acoustic waves, essential in cavitation noise and erosion. ® Heat transfer between the entrapped gas and the surrounding liquid, which is decisive with regard to the phenomenon of sonoluminescence, i.e. light emission by collapsing bubbles, as it controls the temperature reached inside the bubble at the end of the collapse. ® Vaporization, which requires heat transfer and consequently temperature gradients between the liquid and the bubble and which is the cause of thermal delay in cavitation. This phenomenon is currently referred to as the thermo- dynamic effect. The present chapter is devoted to the presentation of the fundamental ideas and classical results concerning these problems. More detailed analyses can be found in books dedicated to specialized aspects, for example LAUTERBORN (1979), TREVENA (1987), LEIGHTON (1994). 5.1. THE EFFECT OF COMPRESSIBILITY 5.1.1. TAIT'S EQUATION OF STATE In order

Published: Jan 1, 2005

Keywords: Cavitation Bubble; Vapor Bubble; Bubble Radius; Cavitation Number; Spherical Bubble

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