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Experimental and numerical studies of the flow structure generated by a submerged sluice gate

Cassan, Ludovic and Belaud, Gilles Experimental and numerical studies of the flow structure generated by a submerged sluice gate. (2010) In: First IAHR European Congress (2010), 4-6 May 2010, Edinburgh, Scotland . (Unpublished)

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Official URL: http://www.iahr.org/site/cms/contentCategoryView.asp?category=82

Abstract

Sluice gates are commonly used to control discharge and levels, and to monitor discharge. However discharge formulas perform poorly at large opening and large submergence. This study explores the flow structure under such gates in order to verify commonly used assumptions about contraction coefficient and energy losses. The study is based on experimental results acquired in a laboratory flume. The flow structure was determined experimentally by ADV and numerically with RANS simulations performed with Fluent TM for different configurations of submerged gates and different modelling assumptions. Attention is given to the contracted flow and to the recirculating zone upstream of the gate. The experimental results on velocity are consistent with RANS simulations as far as discharge coefficients, wall shear stress and flow structure are concerned. Contraction coefficients were compared with analytical calculations based on potential flow and momentum balance. It is verified that, as usually assumed, the viscosity effects have a limited influence on the flow structure. We show that contraction coefficients should not be considered as constant at large submergence and large opening, which is a reason of the poor performance of the discharge formulas in these regimes.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > AgroParisTech (FRANCE)
Other partners > Centre International de Hautes Etudes Agronomiques Méditerranéennes - CIHEAM (FRANCE)
French research institutions > Centre de Coopération Internationale en Recherche Agronomique - CIRAD (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Other partners > Montpellier SupAgro (FRANCE)
French research institutions > Institut national de recherche en sciences et technologies pour l’environnement et l’agriculture - CEMAGREF (FRANCE)
Laboratory name:
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Deposited By: Ludovic CASSAN
Deposited On:10 Jul 2013 09:46

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