Negative surges in open channels: physical and numerical modeling

Martina Reichstetter and Chanson, Hubert (2013) Negative surges in open channels: physical and numerical modeling. Journal of Hydraulic Engineering, 139 3: 341-346. doi:10.1061/(ASCE)HY.1943-7900.0000674

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Author Martina Reichstetter
Chanson, Hubert
Title Negative surges in open channels: physical and numerical modeling
Journal name Journal of Hydraulic Engineering   Check publisher's open access policy
ISSN 0733-9429
Publication date 2013-03
Year available 2012
Sub-type Article (original research)
DOI 10.1061/(ASCE)HY.1943-7900.0000674
Open Access Status File (Author Post-print)
Volume 139
Issue 3
Start page 341
End page 346
Total pages 6
Place of publication Reston, VA, U.S.A.
Publisher American Society of Civil Engineers
Collection year 2014
Language eng
Formatted abstract
Negative surges can be caused by a sudden change in flow resulting from a decrease in water depth. In the present study, some physical experiments were conducted in a rectangular channel to characterize the unsteady free-surface profile and longitudinal velocity beneath a negative surge propagating upstream. The physical observations showed that, during the first initial instants, the celerity of the surge leading edge increased rapidly with time, while later the negative surge propagated upstream in a more gradual manner with a celerity decreasing slowly with increasing distance. The velocity data highlighted some relatively large turbulent fluctuations beneath the negative surge. The physical results were used to test the analytical solution of the Saint-Venant equations and some numerical models. The findings suggested that the negative surge propagation appeared relatively little affected by the boundary friction within the investigated flow conditions.
Keyword Negative surges
Unsteady open channel flow
Physical modeling
Numerical modeling
Water depth
Negative waves
Doppler-velocimeter data
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online on September 6, 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 8 times in Scopus Article | Citations
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Created: Thu, 28 Feb 2013, 01:28:04 EST by Hubert Chanson on behalf of School of Civil Engineering