Air-water flow properties in step cavity down a stepped chute

Felder, Stefan and Chanson, Hubert (2011) Air-water flow properties in step cavity down a stepped chute. International Journal of Multiphase Flow, 37 7: 732-745. doi:10.1016/j.ijmultiphaseflow.2011.02.009

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Author Felder, Stefan
Chanson, Hubert
Title Air-water flow properties in step cavity down a stepped chute
Journal name International Journal of Multiphase Flow   Check publisher's open access policy
ISSN 0301-9322
1879-3533
Publication date 2011-09-01
Sub-type Article (original research)
DOI 10.1016/j.ijmultiphaseflow.2011.02.009
Open Access Status File (Author Post-print)
Volume 37
Issue 7
Start page 732
End page 745
Total pages 14
Place of publication Oxford, U.K.
Publisher Pergamon
Collection year 2012
Language eng
Formatted abstract
For the last three decades, the research into skimming flows down stepped chutes was driven by needs for better design guidelines. The skimming flow is characterised by some momentum transfer from the main stream to the recirculation zones in the shear layer developing downstream of each step edge. In the present study some physical modelling was conducted in a relatively large facility and detailed air-water flow measurements were conducted at several locations along a triangular cavity. The data implied some self-similarity of the main flow properties in the upper flow region, at step edges as well as at all locations along the step cavity. In the developing shear layer and cavity region (i.e. y/h < 0.3), the air-water flow properties presented some specific features highlighting the development of the mixing layer downstream of the step edge and the strong interactions between cavity recirculation and mainstream skimming flows. Both void fraction and bubble count rate data showed a local maximum in the developing shear layer, although the local maximum void fraction was always located below the local maximum bubble count rate. The velocity profiles had the same shape as the classical mono-phase flow data. The air-water flow properties highlighted some intense turbulence in the mixing layer that would be associated with large shear stresses and bubble-turbulence interactions.
© 2011 Elsevier Ltd. All rights reserved.
Keyword Air-water flow properties
Bubbly flow properties
Physical modelling
Step cavity
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 2012 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 16 times in Scopus Article | Citations
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Created: Fri, 24 Jun 2011, 15:28:53 EST by Hubert Chanson on behalf of School of Civil Engineering