Journal of hydraulic research, Vol. 46 N°6. Journal of hydraulic research - 2008
| Titre : | Journal of hydraulic research, Vol. 46 N°6. Journal of hydraulic research - 2008 |
| Type de document : | Bulletin |
| Paru le : | 25/02/2009 |
Dépouillements
Article : texte imprimé
Emmanuel Mignot, Auteur ;
André Paquier, Auteur ;
Nicolas Riviere, Auteur
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During severe urban flooding, the surface flow can become supercritical near some crossroads if the slope of the streets reaches a critical steepness. The present study aims to validate the capacity of a code solving the two-dimensional shallow [...]
Article : texte imprimé
R. F. Carvalho, Auteur ;
C. M. Lemos, Auteur ;
C. M. Ramos, Auteur
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The formation of a hydraulic jump in a stilling basin downstream of a spillway with Froude number Fr = 6 and developed upstream flow was investigated using a physical and a numerical model. The numerical model is based on the 2D Reynolds-average[...]
Article : texte imprimé
Leonardo Schippa, Auteur ;
Sara Pavan, Auteur
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Starting from the classical conservative form of the shallow water equations, the source term of the momentum balance equation was modified to increase computational stability. This was achieved by replacing the term representing the local bed s[...]
Article : texte imprimé
Alex Bey, Auteur ;
M. A. A. Faruque, Auteur ;
Ram Balachandar, Auteur
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An experimental program was carried out to understand the role of channel width and varying tailwater depth on the scour caused by a plane wall jet. To this end, four groups of tests, denoted as A, B, C and D, were conducted. In group A, during [...]
Article : texte imprimé
Tarek Salaheldin Mostafa, Auteur ;
Jasim Imran, Auteur ;
M. Hanif Chaudhry, Auteur
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This paper presents experimental results on surface erodibility tests performed with undisturbed and remolded samples of cohesive soils. When subjected to shear stress caused by flowing water, erosion occurs in two distinctive modes: particle er[...]
Article : texte imprimé
Roger I. Nokes, Auteur ;
Mark J. Davidson, Auteur ;
Charlotte A. Stepien, Auteur
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A mathematical model is developed for a high Reynolds number, quasi-steady, intrusive gravity current propagating into a two-layer ambient fluid. The model is based on inviscid, irrotational flow theory, and is used to predict the rate of advanc[...]
Article : texte imprimé
Athanassios A. Dimas, Auteur ;
Nikolaos Th. Fourniotis, Auteur ;
Andreas P. Vouros, Auteur
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The spatial development of turbulent, sub-critical open-channel flow over five identical dunes is studied by the numerical solution of the RANS equations utilizing theVOF free-surface formulation and the k–ε or Spalart–Allmaras turbulence models[...]
Article : texte imprimé
Hojjat Allah Yonesi, Auteur ;
Mohhamad Hossein Omid, Auteur ;
Amir Hamzeh Haghiabi, Auteur
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Constructing intake structures to divert some part of the flow from rivers causes some changes in hydraulic conditions of the flow in front of the intake port. These changes, like flows in river bends, induce secondary flows, thereby causing sed[...]
Article : texte imprimé
Barry Ying-Fan Tam, Auteur ;
Chi-Wai Li, Auteur
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The flow characteristics of a vertical turbulent jet discharged in random-waves environment have been investigated experimentally to assess the dilution of wastewater discharge in coastal areas. The results show that additional wave induced mixi[...]
Article : texte imprimé
Nathan Q. Smith, Auteur ;
Michael C. Johnson, Auteur ;
Steven L. Barfuss, Auteur
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Cavitation is the rapid vaporization and condensation of a liquid and was a focus of study for years because of its negative impacts on hydraulic systems including noise, vibration, erosion damage, pressure fluctuations, and loss of efficiency. [...]
Article : texte imprimé
Jinn-Chyi Chen, Auteur ;
Jan, Chyan-Deng, Auteur ;
Ming-Hsi Lee, Auteur
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A probabilistic equation of design discharge for a mountainous gully was derived in terms of reliability probability. Its derivation was based on the rational formula, the rainfall-intensity-duration formula, and the First-Order Second-Moment me[...]
Article : texte imprimé
Alberto Carlos De Melo Lima, Auteur ;
Harry Edmar Schulz, Auteur ;
John S. Gulliver, Auteur
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Air concentration measurements performed along the lower nappe of a bottom aerator through the impact and downstream flow regions permitted the calculation of air entrainment along the jet length. The air uptake was also measured in the air supp[...]
Article : texte imprimé
Oscar Castro-Orgaz, Auteur ;
Juan Vicente Giraldez, Auteur ;
Jose Luis Ayuso, Auteur
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The definitions of the critical flow condition in open channel hydraulics, based on the momentum and the energy equations, differ from each other if non-hydrostatic pressure and non-uniform velocity distributions are considered. The concept of m[...]
Article : texte imprimé
Oscar Castro-Orgaz, Auteur ;
Juan Vicente Giraldez, Auteur ;
Jose Luis Ayuso, Auteur
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A new extended Bernoulli energy equation, which is valid for moderately curved channel flows, is presented. From this generalized energy equation, a higher order critical flow condition valid for curved streamline flow was developed. As a practi[...]
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