Journal of hydraulic research, Vol. 47 N° 4. journal of hydraulic research - 2009
| Titre : | Journal of hydraulic research, Vol. 47 N° 4. journal of hydraulic research - 2009 |
| Type de document : | Bulletin |
| Paru le : | 10/01/2010 |
Dépouillements
Article : texte imprimé
William G. Gray, Auteur ;
Mohamed Salah Ghidaoui, Auteur
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The equation for entropy generation is derived directly from the conservation equations for onedimensional channel flow. Mass, momentum, and energy equations are averaged from their microscale form to the onedimensional forms used in channel m[...]
Article : texte imprimé
Xiaonan Tang, Auteur ;
Donald W. Knight, Auteur
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Various models for the analytical solution to the depth-integrated Navier-Stokes equations, applied to open channel flows, are discussed. These models include the effects of bed friction, lateral turbulence and secondary flows. The model develop[...]
Article : texte imprimé
Alireza Riasi, Auteur ;
Ahmad Nourbakhsh, Auteur ;
Mehrdad Raisee, Auteur
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The behaviour of unsteady turbulent pipe flow resulting from water hammer is herein numerically studied. An accurate k-ω turbulence model for two-dimensional boundary layers under adverse and favorable pressure gradients (Wilcox 1994) was applie[...]
Article : texte imprimé
Francisco Pedocchi, Auteur ;
Marcelo H. Garcia, Auteur
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Observations of turbulent, oscillatory boundary-layer flows show that the behavior of the friction coefficient in the transition from hydraulically rough to smooth regimes is not well captured by existing semi-empirical expressions obtained for [...]
Article : texte imprimé
Wonjun Yang, Auteur ;
Choi, Sung-Uk, Auteur
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This study presents the results of laboratory experiments on depth-limited open channel flow with submerged vegetation. To investigate the impact of stem flexibility on the mean flow and turbulence structures, two flow types with similar drags b[...]
Article : texte imprimé
Hequing Huang, Auteur ;
Jasim Imran, Auteur ;
Carlos Pirmez, Auteur
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The non-dimensional parameters involved in a four-equation depth-averaged model of gravity flows have been studied using a vertical structure resolving numerical model at both field and laboratory scales. The main findings of this study are: (i)[...]
Article : texte imprimé
Michael Pfister, Auteur ;
Willi H. Hager, Auteur
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Free jets issued at the end of chutes may be generated rather with deflectors than with flip buckets. The latter jet trajectories were previously investigated, using the standard approach based on the take-off angle. However, few information con[...]
Article : texte imprimé
Ali Mahdavi, Auteur ;
Nasser Talebbeydokhti, Auteur
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A numerical model based on the non-linear shallow water equations is developed to investigate the propagation and run-up of both non-breaking and breaking solitary waves. The present model utilizes an explicit centered scheme in conjugation with[...]
Article : texte imprimé
Rupp Carriveau, Auteur ;
Gregory A. Koop, Auteur ;
Raouf E. Baddour, Auteur
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An experimental investigation of vortices at deep hydraulic intakes revealed two distinct categories of free surface intake vortex. In case 1 when the strain field was strong enough, without an external, quantifiable source of vorticity, minor a[...]
Article : texte imprimé
Jong-Woo Kim, Auteur ;
Franz Nestmann, Auteur
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This paper contributes to the understanding of the effect of suspended sediment deposition and turbidity on aquatic systems. The influence of the cohesive properties of clay on its settling behaviour was quantified in still distilled water with [...]
Article : texte imprimé
Pagliara, Stefano, Auteur ;
Michele Palermo, Auteur ;
Iacopo Carnacina, Auteur
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The scour process downstream of block ramps is strongly affected by both the stilling basin geometry and the hydraulic conditions. Particular effects include the ramp slope and the geometry of the stilling basin. The aim of this experimental stu[...]
Article : texte imprimé
Cedo Maksimovic, Auteur ;
Dusan Prodanovic, Auteur ;
Surajate Boonya-Aroonnet, Auteur
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Research on improving an overland flow model is presented for urban pluvial flooding under the dual-drainage concept where sewer flow dynamically interacts with overland flow. This occurs during heavy storms when the sewer system is surcharged. [...]
Article : texte imprimé
Lai Wai Tan, Auteur ;
Vincent H. Chu, Auteur
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Lauber and Hager (1998) have provided a complete set of laboratory data, with both velocity and depth profiles for dam-break flood wave released from a reservoir of finite dimension. At the advancing wave front, the water depth reduces to zero a[...]
Article : texte imprimé
Achanta Ramakrishna Rao, Auteur ;
Bimlesh Kumar, Auteur
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The velocity profile in turbulent pipe flow is usually divided into two regions, a wall or inner region and a core or outer region. For the inner region, the viscosity and wall shear stress are the important parameters governing the velocity dis[...]
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