| Titre : | Champ de vitesses et contraintes de cisaillement dans un collecteur d'assainissement (2010) |
| Auteurs : | Hossein Bonakdari, Auteur ; Frederique Larrarte, Auteur ; Claude Joannis, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | La Houille blanche (N° 3, Mai/Juin 2008) |
| Article en page(s) : | pp. 20-25 |
| Note générale : | Hydraulique |
| Langues : | Français |
| Tags : | 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 |
| En ligne : | http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/lhb/abs/2008/03/lhb2008022/lhb2008022.html |
