Effect of Froude number on bubble clustering in a hydraulic jump

Gualtieri, Carlo and Chanson, Hubert (2010) Effect of Froude number on bubble clustering in a hydraulic jump. Journal of Hydraulic Research, 48 4: 504-508. doi:10.1080/00221686.2010.491688

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Author Gualtieri, Carlo
Chanson, Hubert
Title Effect of Froude number on bubble clustering in a hydraulic jump
Journal name Journal of Hydraulic Research   Check publisher's open access policy
ISSN 0022-1686
1814-2079
Publication date 2010-08
Sub-type Article (original research)
DOI 10.1080/00221686.2010.491688
Open Access Status File (Author Post-print)
Volume 48
Issue 4
Start page 504
End page 508
Total pages 5
Place of publication Madrid, Oxfordshire, Spain
Publisher Taylor & Francis
Collection year 2011
Language eng
Subject 090509 Water Resources Engineering
C1
09 Engineering
0905 Civil Engineering
970109 Expanding Knowledge in Engineering
Abstract The study of bubble clustering processes may provide a significant insight into turbulent air–water flows. Previous studies investigated these processes in plunging jets, dropshafts and hydraulic jumps. This research investigates the bubble clustering process in hydraulic jumps using experimental data collected in a rectangular horizontal flume with partially developed inflow conditions for inflow Froude numbers in the range 6.5–14.3. Two criteria for cluster identification were applied: one criterion was based upon a comparison of the local instantaneous water chord time with the median water chord time, whereas the second identified a cluster if the water chord time was smaller than the air chord time of the preceding bubble, i.e. a bubble was in the near-wake of the leading bubble. The results highlight significant patterns in clusters production both over the flow depth and the distance from the jump toe. The effect of the inflow flow Froude number on the clustering process is also discussed. © 2010 International Association for Hydro-Environment Engineering and Research
Keyword Hydraulic jumps
Air entrainment
Bubble clustering
Turbulent shear flows
laboratory experiments
Flow structure
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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Created: Wed, 06 Oct 2010, 10:21:19 EST by Hubert Chanson on behalf of School of Civil Engineering