Air-Water Flows Down Stepped Chutes : Turbulence and Flow Structure Observations

Chanson, Hubert and Toombes, Luke (2002) Air-Water Flows Down Stepped Chutes : Turbulence and Flow Structure Observations. International Journal of Multiphase Flow, 28 11: 1737-1761.

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Author Chanson, Hubert
Toombes, Luke
Title Air-Water Flows Down Stepped Chutes : Turbulence and Flow Structure Observations
Journal name International Journal of Multiphase Flow
Publication date 2002-01-01
Sub-type Article (original research)
Volume 28
Issue 11
Start page 1737
End page 1761
Subject 290501 Mechanical Engineering
291100 Environmental Engineering
299904 Engineering/Technology Instrumentation
291800 Interdisciplinary Engineering
290601 Chemical Engineering Design
291801 Fluidization and Fluid Mechanics
291803 Turbulent Flows
299900 Other Engineering and Technology
290802 Water and Sanitary Engineering
290800 Civil Engineering
299999 Engineering and Technology not elsewhere classified
Abstract Interactions between turbulent waters and atmosphere may lead to strong air-water mixing. This experimental study is focused on the flow down a staircase channel characterised by very strong flow aeration and turbulence. Interfacial aeration is characterised by strong air-water mixing extending down to the invert. The size of entrained bubbles and droplets extends over several orders of magnitude, and a significant number of bubble/droplet clusters was observed. Velocity and turbulence intensity measurements suggest high levels of turbulence across the entire air-water flow. The increase in turbulence levels, compared to single-phase flow situations, is proportional to the number of entrained particles.
Keyword air-water flows
stepped cascade
turbulence
bubbles
droplets
cluster
experimental data
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Originally published as H. Chanson and L. Toombes (2002) Air-water flows down stepped chutes: turbulence and flow structure observations, International Journal of Multiphase Flow, 28 (11) : 1737-1761. Copyright 2002 Pergamon Press. All rights reserved. Single copies only may be downloaded for a user's private research or study.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Civil Engineering Publications
 
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Created: Fri, 30 Sep 2005, 10:00:00 EST by Hubert Chanson on behalf of Research Management Office