Journal of hydraulic research, Vol. 50 N° 2. Journal of hydraulic research - Mars/Avril 2012
| Titre : | Journal of hydraulic research, Vol. 50 N° 2. Journal of hydraulic research - Mars/Avril 2012 |
| Type de document : | Bulletin |
| Paru le : | 11/06/2012 |
Dépouillements
Article : texte imprimé
Jaan Hui Pu, Auteur ;
Cheng, Nian-Sheng, Auteur ;
Keat Tan, Soon, Auteur
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Owing to unpredictable bed topography conditions in natural shallow flows, various numerical methods have been developed to improve the treatment of source terms in the shallow water equations. The surface gradient method is an attractive approa[...]
Article : texte imprimé
Alberto Serrano-Pacheco, Auteur ;
Javier Murillo, Auteur ;
Garcia-Navarro, Pilar, Auteur
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In this work, two-dimensional (2D) bed-load transport simulations based on the depth-averaged shallow-water equations and the Exner equation are presented. The Exner equation is written assuming that bed-load transport is governed by a power law[...]
Article : texte imprimé
Ghostine, Rabih, Auteur ;
Vazquez, José, Auteur ;
Terfous, Abdelali, Auteur
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In this paper, a comparison between the 1D and 2D approaches for simulating combining flows at open-channel junctions is presented. The two approaches are described allowing for a full comprehension of flow modelling. For flows in an open-channe[...]
Article : texte imprimé
Mokhles M. Abou-Seida, Auteur ;
Gamal H. Elsaeed, Auteur ;
Tarek M. Mostafa, Auteur
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The results of a laboratory investigation on local scour at bridge abutments in cohesive soils are presented. Kaolin clay was used as a bed material and vertical wall abutments with three different sizes. Forty experiments were conducted under c[...]
Article : texte imprimé
Michael Pfister, Auteur ;
Willi H. Hager, Auteur
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Jets generated at chute ends move a potential scour zone away from the dam, and dissipate flow energy to reduce the scour. Usually, so-called flip buckets or ski jumps are provided to generate jets, yet they are rarely issued by deflectors. The [...]
Article : texte imprimé
Hesham K. Zare, Auteur ;
John C. Doering, Auteur
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In this study, a two-dimensional physical model was used to evaluate the effectiveness of adding baffles and sills at step edges or of shifting them from step edges of a 1V:1H sloping, short, sharp- or round-crested stepped spillway with an ogee[...]
Article : texte imprimé
Gangarudraiah Veerappadevaru, Auteur ;
Thimmaiah Gangadharaiah, Auteur ;
Thirumalai Ramaswamyiyenger Jagadeesh, Auteur
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The concept of conservation of power during scour by the primary vortex formed in front of caisson piers is used to develop a relation for the temporal of scour depth variation. To test this relation, experiments were conducted using two sedimen[...]
Article : texte imprimé
Michele La Rocca, Auteur ;
Adduce, Claudia, Auteur ;
Giampiero Sciortino, Auteur
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A two-layer, shallow-water model for three-dimensional (3D) gravity currents is proposed. The formulation results from the shallow-water-equations for two layers of immiscible liquids, subjected by the rigid-lid condition, so that the upper surf[...]
Article : texte imprimé
Fadi E. Hachem, Auteur ;
Anton J. Schleiss, Auteur
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The effect of local drop of wall stiffness in pressurized waterways on the pressure wave speed and the wave attenuation during transients is investigated experimentally. A new signal-processing procedure to identify the presence of a weak reach [...]
Article : texte imprimé
Alexandre K. Soares, Auteur ;
Dídia I.C. Covas, Auteur ;
Nelson J.G. Carriço, Auteur
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The research focuses on the analysis of transient cavitating flow in polyethylene pipes, which are characterized by a viscoelastic–rheological behaviour. A hydraulic transient solver incorporating the description of the rheological–mechanical be[...]
Article : texte imprimé
Jianmin Zhang, Auteur ;
Jiangang Chen, Auteur ;
Yurong Wang, Auteur
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Steps located in the non-aerated flow region of a chute are prone to cavitation damage. Two models operated with various Froude numbers and bottom slopes were employed to measure the pressure on the steps. The minimum and maximum pressures on th[...]
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Michael Pfister, Auteur ;
Chanson, Hubert, Auteur
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Article : texte imprimé
Ali Tafarojnoruz, Auteur ;
Roberto Gaudio, Auteur
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