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Water bells formed on the underside of a horizontal plate. Part 1. Experimental investigation

Published online by Cambridge University Press:  13 April 2010

GRAEME J. JAMESON*
Affiliation:
Centre for Multiphase Processes, University of Newcastle, Callaghan, New South Wales 2308, Australia
CLAIRE E. JENKINS
Affiliation:
Centre for Multiphase Processes, University of Newcastle, Callaghan, New South Wales 2308, Australia
ELEANOR C. BUTTON
Affiliation:
Department of Mathematics and Statistics, University of Melbourne, Victoria 3010, Australia
JOHN E. SADER
Affiliation:
Department of Mathematics and Statistics, University of Melbourne, Victoria 3010, Australia
*
Email address for correspondence: graeme.jameson@newcastle.edu.au

Abstract

In this study we report discovery of a new type of water bell. This is formed by impinging a vertical liquid jet on to the underside of a large horizontal flat plate. After impact, the liquid spreads radially along the plate before falling at an abrupt unspecified radius. This falling liquid may then coalesce to form a curtain which encloses a volume of air. When the flow rate of the impinging jet is altered from the value at initial formation, a pronounced hysteretic effect in the water bell shape can be observed. We present detailed observations of these new phenomena, including the size and nature of the flow underneath the plate and the shape of the liquid curtain. These observations are interpreted theoretically in a companion paper (Part 2, Button et al. vol. 649, 2010, pp. 45–68).

Type
Papers
Copyright
Copyright © Cambridge University Press 2010

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