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UID:2871@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20190409T110000
DTEND;TZID=Europe/Paris:20190409T120000
DTSTAMP:20190325T100000Z
URL:https://www.i2m.univ-amu.fr/evenements/on-the-saint-venant-exner-model
 -with-arbitrarily-sloping-sediment-beds/
SUMMARY: (...): On the Saint-Venant-Exner model with arbitrarily sloping se
 diment beds
DESCRIPTION::  Firstly\, in this talk a formal deduction of the  Saint-Vena
 nt-Exner model through an asymptotic analysis of the Navier-Stokes equatio
 ns will be presented. A multi-scale analysis is performed in order to take
  into account that the velocity of the sediment layer is smaller than the 
 one of the fluid layer. Then\, a correction of classical models is propose
 d. The proposed models have an associated energy and they incorporate a ne
 cessary modification that must be taken into account in order to be applie
 d to arbitrarily sloping beds. Some of these simplified models correspond 
 to a generalization of classic ones such as Meyer-Peter&Müller and Ashida
 -Michiue models. Secondly\, a bilayer shallow water type model will be pre
 sented\, that can be considered  to describe bedload sediment transport fo
 r strong and weak interactions between the fluid and the sediment. Several
  numerical tests will be finally presented\, to study the evolution of a d
 une in terms of the repose angle of the material\, to see the influence of
  the proposed definition of the effective shear stress in comparison with 
 the classic one\, by comparing the Saint-Venant-Exner model with the bilay
 er one\, and by comparing with experimental data.http://personal.us.es/edo
 fer/
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DTSTART:20190331T030000
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