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Splash formation by spherical drops

Published online by Cambridge University Press:  07 February 2001

LIOW JONG LENG
LIOW JONG LENG
Affiliation:
GK Williams Cooperative Research Centre for Extractive Metallurgy, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia 3052
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Abstract

The impact of a spherical water drop onto a water surface has been studied experimentally with the aid of a 35 mm drum camera giving high-resolution images that provided qualitative and quantitative data on the phenomena. Scaling laws for the time to reach maximum cavity sizes have been derived and provide a good fit to the experimental results. Transitions between the regimes for coalescence-only, the formation of a high-speed jet and bubble entrapment have been delineated. The high-speed jet was found to occur without bubble entrapment. This was caused by the rapid retraction of the trough formed by a capillary wave converging to the centre of the cavity base. The converging capillary wave has a profile similar to a Crapper wave. A plot showing the different regimes of cavity and impact drop behaviour in the Weber–Froude number-plane has been constructed for Fr and We less than 1000.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 427 , 25 January 2001 , pp. 73 - 105
Copyright
© 2001 Cambridge University Press

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