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The turbulent wall plume from a vertically distributed source of buoyancy

Published online by Cambridge University Press:  15 December 2015

Craig D. McConnochie  and
Ross C. Kerr
Craig D. McConnochie*
Affiliation:
Research School of Earth Sciences, The Australian National University, Canberra, ACT 2601, Australia
Ross C. Kerr
Affiliation:
Research School of Earth Sciences, The Australian National University, Canberra, ACT 2601, Australia
*
†Email address for correspondence: craig.mcconnochie@anu.edu.au
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Abstract

We experimentally investigate the turbulent wall plume that forms next to a uniformly distributed source of buoyancy. Our experimental results are compared with the theoretical model and experiments of Cooper & Hunt (J. Fluid Mech., vol. 646, 2010, pp. 39–58). Our experiments give a top-hat entrainment coefficient of $0.048\pm 0.006$ . We measure a maximum vertical plume velocity that follows the scaling predicted by Cooper & Hunt but is significantly smaller. Our measurements allow us to construct a turbulent plume model that predicts all plume properties at any height. We use this plume model to calculate plume widths, velocities and Reynolds numbers for typical dissolving icebergs and ice fronts and for a typical room with a heated or cooled vertical surface.

JFM classification

Convection: Convection in cavities Convection: Plumes/thermals Turbulent Flows: Turbulent convection

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Papers
Information
Journal of Fluid Mechanics , Volume 787 , 25 January 2016 , pp. 237 - 253
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Copyright
© 2015 Cambridge University Press 

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