Hydrodynamics and turbulence in positive surges: A comparative study

Gualtieri, C. and Chanson, H. (2011). Hydrodynamics and turbulence in positive surges: A comparative study. In: Eric Valentine, Colin Apelt, James Ball, Hubert Chanson, Ron Cox, Robert Ettema, George Kuczera, Martin Lambert, Bruce Melville and Jane Sargison, `. 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering, Brisbane, Australia, (1062-1069). 26 June - 1 July 2011.

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Author Gualtieri, C.
Chanson, H.
Title of paper Hydrodynamics and turbulence in positive surges: A comparative study
Conference name 34th IAHR World Congress, 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering
Conference location Brisbane, Australia
Conference dates 26 June - 1 July 2011
Proceedings title `
Place of Publication Barton, ACT, Australia
Publisher Engineers Australia
Publication Year 2011
Sub-type Fully published paper
ISBN 9780858258686
0858258684
Editor Eric Valentine
Colin Apelt
James Ball
Hubert Chanson
Ron Cox
Robert Ettema
George Kuczera
Martin Lambert
Bruce Melville
Jane Sargison
Start page 1062
End page 1069
Total pages 8
Collection year 2012
Language eng
Abstract/Summary A positive surge results from a sudden change in flow that increases the depth. It is the unsteady flow analogy of the stationary hydraulic jump and a geophysical application is the tidal bore. Positive surges are commonly studied using the method of characteristics and the Saint-Venant equations. The paper presents the results from new experimental investigations conducted in a large rectangular channel. Detailed unsteady velocity measurements were performed with a high temporal resolution using acoustic Doppler velocimetry and non-intrusive free-surface measurement devices. Two series of data were collected with a horizontal bed slope, a constant flow rate (Q=0.060 m³/s) and two different downstream gate openings after closure, which resulted in undular (non-breaking) and in breaking bores, respectively. The analysis of undular free-surface profiles revealed a good agreement with previous both theoretical and experimental studies. Unsteady flow turbulence analysis revealed some significant patterns in streamwise and transverse velocities.
Keyword Environmental hydraulics
Turbulence
Positive surge
Surge front
Free surface measurements
Instantaneous velocity field
Physical modelling
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Joint Conference: 34th World Congress of the International Association for Hydro-Environment Engineering and Research (IAHR); 33rd National Hydrology and Water Resources Symposium; and the 10th National Conference on Hydraulics in Water Engineering.

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2012 Collection
 
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Created: Sat, 02 Jul 2011, 14:26:50 EST by Hubert Chanson on behalf of School of Civil Engineering