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.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
155 articles.
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