Experimental study of a positive surge. Part 2: comparison with literature theories and unsteady flow field analysis

Gualtieri, Carlo and Chanson, Hubert (2011) Experimental study of a positive surge. Part 2: comparison with literature theories and unsteady flow field analysis. Environmental Fluid Mechanics, 11 6: 641-651. doi:10.1007/s10652-011-9222-3


Author Gualtieri, Carlo
Chanson, Hubert
Title Experimental study of a positive surge. Part 2: comparison with literature theories and unsteady flow field analysis
Journal name Environmental Fluid Mechanics   Check publisher's open access policy
ISSN 1567-7419
1573-1510
Publication date 2011-12
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1007/s10652-011-9222-3
Volume 11
Issue 6
Start page 641
End page 651
Total pages 11
Place of publication Netherlands
Publisher Springer Netherlands
Collection year 2012
Language eng
Formatted abstract
A positive surge is a unsteady open channel flow resulting from the rapid rise of the free-surface. The phenomenon may be observed in water supply canals and channels as well as in some estuaries during spring tidal conditions. The formation and development of positive surges can be predicted using the method of characteristics and shallow water equations. The paper is the second part of a study presenting 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. Several experiments were conducted with the same initial discharge (Q = 0.060 m3/s) and six different gate openings after closure resulting in both non-breaking undular and breaking bores. A comparison between main features of the undular surges with literature theories demonstrated that the experimental data were mostly in agreement with Andersen's theory. The analysis of unsteady flow field including Reynolds stresses confirmed and extended previous findings about positive surge hydrodynamics.
Keyword Environmental hydraulics
Free surface measurements
Instantaneous velocity field
Physical modeling
Positive surge
Reynolds stresses
Surge front
Undular surges analysis
Unsteady flow field
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: School of Civil Engineering Publications
Official 2012 Collection
 
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Created: Tue, 15 Nov 2011, 06:15:19 EST by Hubert Chanson on behalf of School of Civil Engineering