Flow convergence at the tip and edges of a viscous dam break wave

Baldock, T. E., Grayson, R., Torr, B. and Power, H. E. (2010). Flow convergence at the tip and edges of a viscous dam break wave. In: G. D. Mallinson and J. E. Cater, Proceedings of the 17th Australasian Fluid Mechanics Conference. 17AFMC: 17th Australasian Fluid Mechanics Conference, Auckland, N.Z., (148-151). 5-9 December 2010.

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Author Baldock, T. E.
Grayson, R.
Torr, B.
Power, H. E.
Title of paper Flow convergence at the tip and edges of a viscous dam break wave
Conference name 17AFMC: 17th Australasian Fluid Mechanics Conference
Conference location Auckland, N.Z.
Conference dates 5-9 December 2010
Proceedings title Proceedings of the 17th Australasian Fluid Mechanics Conference
Place of Publication Auckland, New Zealand
Publisher Australasian Fluid Mechanics Society
Publication Year 2010
Sub-type Fully published paper
ISBN 9780868691299
Editor G. D. Mallinson
J. E. Cater
Start page 148
End page 151
Total pages 4
Collection year 2011
Language eng
Formatted Abstract/Summary
The details of the flow at the tip of a dam-break wave are important to describe the propagation of the wave, bed shear and to estimate sediment transport rates and impact forces. This paper will present novel dam-break experiments using a very viscous fluid (detergent) to slow the flow sufficiently to enable tracking of particles on the free surface streamline. The experiments are performed both up a slope and on a horizontal bed. The video tracking shows that particles converge on the tip and then rapidly decelerate, a process that will induce a high bed shear stress. Particles also converge on the wall boundaries because of the noslip condition. At the time of writing, this flow convergence does not appear to be included in analytical modeling of the tip region and the basal resistance. The dam-break flow is also analogous to wave and tsunami run-up on beaches, so the data may contribute to improved descriptions of the run-up for those flow types.
Keyword Dam-break wave
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes paper/page 148 of downloaded zip file from http://www.17afmc.com/17afmc/index.cfm?p=programme2

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2011 Collection
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Created: Thu, 24 Feb 2011, 11:28:40 EST by Jeannette Watson on behalf of School of Civil Engineering