On granular rheology in bedload transport - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2015

On granular rheology in bedload transport

Résumé

The local granular phase rheology in bedload transport is investigated from discrete numerical simulations. The numerical model is based on a coupled Discrete Element Method with a 1D space-averaged fluid momentum balance. Using this model the averaged granular stress tensor profile can be computed from particle-particle interactions. In bed-load transport, the granular media exhibits quasi-static and dynamical behaviors. This physical situation can be used as a rheometer and the actual granular rheology can be deduced from a single simulation. Preliminary results suggests that the denser part of the flow, close to the static bed, is well described by a a μ(I)/Φ(I) rheology. Above this layer, the dense granular flow rheology fails to explain the observed shear and normal stresses, meaning that other mechanisms come into play.

Mots clés

Fichier principal
Vignette du fichier
bitstream_116982.pdf (326.56 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03444975 , version 1 (23-11-2021)

Identifiants

  • HAL Id : hal-03444975 , version 1

Citer

Raphael Maurin, Julien Chauchat, Bruno Chareyre, Philippe Frey. On granular rheology in bedload transport. CFM 2015 - 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨hal-03444975⟩
23 Consultations
12 Téléchargements

Partager

Gmail Facebook X LinkedIn More