Champ de vitesses et contraintes de cisaillement dans un collecteur d'assainissement / Hossein Bonakdari in La Houille blanche, N° 3 (Mai/Juin 2008)  

Champ de vitesses et contraintes de cisaillement dans un collecteur d'assainissement [texte imprimé] / Hossein Bonakdari, Auteur ; Frederique Larrarte, Auteur ; Claude Joannis, Auteur . - 2010 . - pp. 20-25.
Hydraulique
Langues : Français (fre)
in La Houille blanche > N° 3 (Mai/Juin 2008) . - pp. 20-25

Mots-clés :	Champ de vitesses Contraintes cisaillement Collecteur d'assainissement
Résumé :	The presence of sediment at the bottom of the collectors is of interest for hydraulic and environmental reasons. Design rules enable avoiding silting in a wide range of situation, but are not suited for accurately assessing risk for a particular facility. The stress at the bottom is a determining parameter for the processes of sedimentation and erosion and results from the velocity field in a cross section. This article presents an experimental and numerical approach of the space distribution of the velocities and shear stresses in a collector of sewers network. The results show that, for the narrow channels, it is necessary to take into account the three-dimensional character of the flow. Numerical modeling provides the lower cost for the results that is difficult to acquire in experiments. On the other hand a total evaluation of the average shear stress seems less adapted to describe the reality of shear stress in the section.
DEWEY :	553.7
ISSN :	0018-6368
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