Collapse of a cavitation bubble generated by low voltage discharge in water

Miloš Müller¹, Jiří Unger¹, Tomáš Bud’arek¹ and Patrik Zima²

¹ Faculty of Mechanical Engineering, Technical University of Liberec, Hálkova 6, 46117, Liberec 1, Czech Republic
milos.mulier@tul.cz, jiri.unger,a.@tul.cz, T.Budarek aseznam.cz
² Department of Thermodynamics, Institute of Thermomechanics, v. v. i., Academy of Sciences, Dolejškova 5, 18200 Praha, Czech Republic
zimap@it.cas.cz

Published online: 16 April 2012

Abstract

The article presents experimental results of the optical study of cavitation bubble collapse close to a solid boundary in water. The bubble was generated by discharge of two low-voltage capacitors. High-speed CCD camera was used to record the time evolution of the bubble size. High-power halogen lamp was used for illumination. The system was synchronized by pulse generator connected to an oscilloscope. The velocity of the re-entrant jet was estimated from the time resolved photography for different maximum bubble sizes.