Unsteady Air-Water Flow Measurements in Sudden Open Channel Flows

Chanson, Hubert (2004) Unsteady Air-Water Flow Measurements in Sudden Open Channel Flows. Experiments in Fluids, 37 6: 899-909. doi:10.1007/s00348-004-0882-3

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Author Chanson, Hubert
Title Unsteady Air-Water Flow Measurements in Sudden Open Channel Flows
Journal name Experiments in Fluids   Check publisher's open access policy
ISSN 0723-4864
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1007/s00348-004-0882-3
Open Access Status File (Author Post-print)
Volume 37
Issue 6
Start page 899
End page 909
Total pages 11
Editor C. Tropea
D. Rockwell
Place of publication Germany
Publisher Springer-Verlag
Language eng
Subject 291800 Interdisciplinary Engineering
291803 Turbulent Flows
290802 Water and Sanitary Engineering
290800 Civil Engineering
C1
770502 Land and water management
Abstract Measurements of air-water flow properties are reasonably simple in steady flows, but not so in unsteady flows. Some studies investigated periodic flows in which instantaneous data were averaged over several cycles. During the present work, new unsteady air-water flow measurements were performed in sudden open channel flow surges. Unsteady air-water flow measurements were performed in the wave front with an array of resistivity probes. The results demonstrated quantitatively strong aeration of the leading edge in terms of void fractions, bubble count rates and specific interface areas. Experimental results highlighted that this strongly aerated region was relatively short: i.e. typically 0.3 to 0.5 m long. Measurements of air and water chord sizes highlighted a wide range of bubble and droplet sizes. Time-variations of air-water flow structure were observed.
Keyword dam break
air entrainment
unsteady flow two-phase flow measurements
physical modelling
stepped invert
Q-Index Code C1
Additional Notes Originally published as Chanson, Hubert (2004) Unsteady air-water flow measurements in sudden open channel flows, Experiments in Fluids 37 (6): 899-909. Copyright 2004 Springer-Verlag. All rights reserved.

 
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Created: Tue, 09 Aug 2005, 10:00:00 EST by Hubert Chanson on behalf of School of Engineering