Water bells formed on the underside of a horizontal plate. Part 1. Experimental investigation
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).
Copyright and License
© Cambridge University Press 2010.
Acknowledgement
G. J. J. and C. E. J. are grateful to the Australian Research Council (ARC) for support for this work, through the Special Research Centre for Multiphase Processes at the University of Newcastle. E. C. B. and J. E. S. acknowledge funding through the Particulate Fluids Processing Centre of the ARC, and the ARC grants scheme. Thanks are due to Bob Jones, Bob Mead, John Richards, Kitty Tang and Daryl Anderson for their help with the experimental work; and to David Perry, Ashley Sneddon, Joanna Garland and Ben Dwyer for exploratory studies.
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Additional details
- ISSN
- 1469-7645
- Australian Research Council