Journal of hydraulic research, Vol. 46 n°4. Journal of hydraulic research - 2008
| Titre : | Journal of hydraulic research, Vol. 46 n°4. Journal of hydraulic research - 2008 |
| Type de document : | Bulletin |
| Paru le : | 17/09/2008 |
Dépouillements
Article : texte imprimé
Willi H. Hager, Auteur ;
Uno Liiv, Auteur
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Hydraulic engineers are familiar with the Nikuradse sand-roughened pipes, the ‘Nikuradse harp’ describing the friction coefficient of pipe flow, and the Nikuradse plots showing data points almost perfectly arranged along a curve. Who was Nikurad[...]
Article : texte imprimé
John E. Cater, Auteur ;
John J. R. Williams, Auteur
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A detailed Large Eddy Simulation of turbulent flow in a long compound open channel with one floodplain is reported. The Reynolds number is approximately 42,000 and the free surface was treated as fully deformable. The results are in agreement wi[...]
Article : texte imprimé
José F. Rodriguez, Auteur ;
Marcelo H. Garcia, Auteur
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Laboratory experiments have been carried out in order to study secondary circulation and flow variability in straight open channel flows over a rough bed. 3D flow velocities and turbulence characteristics were measured using a micro Acoustic Dop[...]
Article : texte imprimé
A Local Time Stepping (LTS) scheme was applied to an explicit Godunov-type shallow-water model to improve run-time efficiency. Using LTS, the solution in each cell is advanced with the largest power of two multiple of the global time step requir[...]
Article : texte imprimé
Lu, Yan, Auteur ;
Yee-Meng Chiew, Auteur ;
Cheng, Nian-Sheng, Auteur
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The paper presents a review on the state-of-the-art knowledge of how seepage affects the turbulence characteristics in open channel flow and its implication on sediment entrainment.Published literature shows that some effects have been intensive[...]
Article : texte imprimé
Enrique Pena Gonzalez, Auteur ;
Jaime Fe Marqués, Auteur
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This paper presents the experimental validation of a two-dimensional depth-averaged numerical model with uncoupled flow and sediment transport using the finite volume method. Tests were conducted at the Civil Engineering School of the University[...]
Article : texte imprimé
Girish Sankar, Auteur ;
Ram Balachandar, Auteur ;
Rupp Carriveau, Auteur
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Characteristics of a square jet near a free surface were experimentally studied at four different tailwater depths. Velocity measurements were made with a two-component laser Doppler anemometer at five stations along the jet streamwise axis. A q[...]
Article : texte imprimé
Gholamreza Naser, Auteur ;
Karney, Bryan W., Auteur
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This study develops a water quality model in a pipeline during transient conditions using a two-dimensional (2-D) approach including advection, diffusion, and reaction terms. More specifically, using a modified Vardy-Hwang hydraulic model, a 2-D[...]
Article : texte imprimé
Iztok Tiselj, Auteur ;
Janez Gale, Auteur
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Various approaches to integrate instantaneous acceleration models are examined. The basic physical model consists of the one-phase flow water hammer equations with the unsteady wall friction model of Brunone. The numerical scheme is based on cha[...]
Article : texte imprimé
Christopher S. James, Auteur ;
Uwe K. Goldbeck, Auteur ;
Anthony Patini, Auteur
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Resistance equations for flow through emergent vegetation require estimation of the stem drag coefficient, which depends on the vegetation characteristics and the flow conditions. Values of the drag coefficient inferred from flow measurements ar[...]
Article : texte imprimé
Curvilinear flow over round-crested weirs is a problem of both theoretical and practical significance because of its presence in overflow structures used in dam engineering, and its connection to the critical flow principle of hydraulics. The Ja[...]
Article : texte imprimé
Zhi-Qian Wang, Auteur ;
Cheng, Nian-Sheng, Auteur
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This research attempts to qualitatively evaluate the effects of secondary flow on the distribution of suspended sediment concentration. The analysis is simplified using a special mode of secondary flows generated by longitudinal bedforms. In the[...]
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