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Flow characteristics of bottom outlets with moving gates
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Hydraulic Engineering.
2010 (English)In: Journal of Hydraulic Research, ISSN 0022-1686, Vol. 48, no 4, 476-482 p.Article in journal (Refereed) Published
Abstract [en]

This study investigates the discharge characteristics of a bottom outlet with a moving gate by Flow3D. Experimental results for a scale model outlet of the Aswan Dam, Egypt, were used. Two different flow features were found. Pressurized flow established if the flume was filled and then the gate was slowly opened. However, a free surface flow occurred if the gate was fully opened and the entire flume was slowly flooded with water. The numerical simulations successfully captured the two flow patterns as well as the discharges and water surface profiles. The discharges were predicted with sufficient accuracy using the first-order momentum advection scheme. In comparison with the k-epsilon turbulence model, the Re-Normalization Group model yields the best agreement with the experiments. The model performed with similar accuracy for both model and prototype cases.

Place, publisher, year, edition, pages
2010. Vol. 48, no 4, 476-482 p.
Keyword [en]
Bottom outlet, CFD simulation, moving gate, three-dimensional model, VOF model
National Category
Ocean and River Engineering
URN: urn:nbn:se:kth:diva-46682DOI: 10.1080/00221686.2010.507001ISI: 000281759000006ScopusID: 2-s2.0-77956593721OAI: diva2:454113
QC 20111105Available from: 2011-11-05 Created: 2011-11-04 Last updated: 2011-11-05Bibliographically approved

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Dargahi, Bijan
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