Measurement of the impulsive force generated by colapsing bubble close to a solid boundary

0367963 - ÚT 2012 RIV CZ eng C - Conference Paper (international conference)
Müller, M. - Unger, J. - Holata, J. - Zima, Patrik
Measurement of the impulsive force generated by colapsing bubble close to a solid boundary.
International Conference Experimental Fluid Mechanics 2011. Vol. 1. Liberec: TU Liberec, 2011 - (Vít, T.; Dančová, P.; Novotný, P.), s. 309-314. ISBN 978-80-7372-784-0.
[Experimental Fluid Mechanics 2011. Jičín (CZ), 22.11.2011-25.11.2011]
R&D Projects: GA ČR GAP101/10/1428
Institutional research plan: CEZ:AV0Z20760514
Keywords : collapse * bubble * impact force
Subject RIV: BK - Fluid Dynamics

The article presents experimental results of the acoustical and optical study of cavitation bubble collapse close to a solid boundary in water. The bubble was generated by discharge of low-voltage capacitor into a couple of wires closing a simple circuit. Different distances from the solid wall and different maximum bubble radii were studied. The bubble radius was studied using time-resolved photography and by PVDF film sensor glued on the solid boundary. The illumination was provided by high-power led diode. Synchronization of the system was provided by pulse generator connected to an oscilloscope. The impact power of the bubble to the wall was estimated from the time-resolved photography of the bubble and from the PVDF film sensor signal. The PVDF film sensor calibration was performed by a pendulum test to estimate the impact force.
Permanent Link: http://hdl.handle.net/11104/0006694