Convective transport of air bubbles in strong hydraulic jumps

Chanson, Hubert (2010) Convective transport of air bubbles in strong hydraulic jumps. International Journal of Multiphase Flow, 36 10: 798-814. doi:10.1016/j.ijmultiphaseflow.2010.05.006

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Author Chanson, Hubert
Title Convective transport of air bubbles in strong hydraulic jumps
Journal name International Journal of Multiphase Flow   Check publisher's open access policy
ISSN 0301-9322
Publication date 2010-10-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.ijmultiphaseflow.2010.05.006
Open Access Status File (Author Post-print)
Volume 36
Issue 10
Start page 798
End page 814
Total pages 17
Place of publication Oxford, United Kindom
Publisher Pergamon
Language eng
Subject 090509 Water Resources Engineering
09 Engineering
0905 Civil Engineering
970109 Expanding Knowledge in Engineering
Formatted abstract
A hydraulic jump is a flow singularity characterised by a significant amount of air entrainment in the shear zone. The air is entrapped at the jump toe that is a discontinuity between the impinging flow and the roller. The impingement point is a source of air bubbles, as well as a source of vorticity. Herein the convective transport of air bubbles in the jump roller is re-visited. Some analytical extension is presented and the theoretical results are compared with some laboratory experiments conducted in a large-size facility operating at large Froude numbers. The turbulent air bubble mixing coefficient was found to increase linearly with increasing distance and be independent of the Froude and Reynolds numbers. Overall the study highlighted some seminal features of the air–water shear layer in hydraulic jumps with large Froude numbers (5.1 < Fr1 < 11.2). The air bubble entrainment in the mixing zone was a convective transport process, although there was some rapid flow de-aeration for all Froude numbers.
Copyright © 2010 Elsevier Ltd All rights reserved.
Keyword Hydraulic Jumps
Air Bubble Entrainment
Turbulent Mixing
Convective Transport
Strong Jumps
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2011 Collection
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Citation counts: TR Web of Science Citation Count  Cited 24 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 25 times in Scopus Article | Citations
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Created: Thu, 12 Aug 2010, 16:41:33 EST by Hubert Chanson on behalf of School of Civil Engineering