Free-surface profiles, velocity and pressure distributions on a broad-crested weir: a physical study

Felder, Stefan and Chanson, Hubert (2012) Free-surface profiles, velocity and pressure distributions on a broad-crested weir: a physical study. Journal of Irrigation and Drainage Engineering, 138 12: 1068-1074. doi:10.1061/(ASCE)IR.1943-4774.0000515

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Author Felder, Stefan
Chanson, Hubert
Title Free-surface profiles, velocity and pressure distributions on a broad-crested weir: a physical study
Journal name Journal of Irrigation and Drainage Engineering   Check publisher's open access policy
ISSN 0733-9437
1943-4774
Publication date 2012-12
Year available 2012
Sub-type Article (original research)
DOI 10.1061/(ASCE)IR.1943-4774.0000515
Open Access Status File (Author Post-print)
Volume 138
Issue 12
Start page 1068
End page 1074
Total pages 7
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Collection year 2013
Language eng
Formatted abstract
Basic experiments were conducted on a large-size broad-crested weir with a rounded corner. Detailed free-surface, velocity, and pressure measurements were performed for a range of flow conditions. The results showed the rapid flow distribution at the upstream end of the weir and next to the weir brink at large flow rates. The flow properties above the crest were analyzed taking into account the nonuniform velocity and nonhydrostatic pressure distributions. Introducing some velocity and pressure correction coefficients, it is shown that critical flow conditions were achieved above the weir crest for 0.1<x/Lcrest<1. The velocity measurements highlighted a developing boundary layer. The data differed from the smooth turbulent boundary layer theory, although the present results were consistent with earlier studies. On average, the boundary stress was approximately τo/(ρ×g×H1) 0.0015–0.0025.



Keyword Broad-crested weir
Free-surface profile
Velocity distributions
Pressure distributions
Critical flow conditions
Turbulent boundary layer
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 27 July 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
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Created: Thu, 06 Dec 2012, 08:34:46 EST by Hubert Chanson on behalf of School of Civil Engineering