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Modélisation numérique des processus de transport des sédiments et de l'évolution des fonds

We propose a new mixing length profile, based on an extension of von Kármán similarity hypothesis, as well as the associated mixing velocity profile. This profile was compared with other profiles and was tested on three academic and experimental cases. The validation of the model was made from a set of reference examples and concerns the erosion of a bottom of sand in a uniform flow, and the filling of an extraction pit resulting from the tests presented in the European project SANDPIT. -- On propose un nouveau profil de longueur de mélange lm (z), basé sur une extension de l'hypothèse de similitude de von Kármán, ainsi que le profil de vitesse de mélange associé. Ce profil a été comparé à d'autres profils et testé sur trois cas test académiques et expérimentaux. La validation du modèle a été effectuée à partir d'un ensemble d'exemples de références et concernent l'érosion d'un fond de sable érodable dans un écoulement uniforme en canal, et le remplissage d'une fosse d'extraction issus des essais présentés dans le projet Européen SANDPIT.

preprint2011arXivOpen access

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