Cohesion and aggregates in unsaturated wet granular flows down a rough incline - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue (Article De Synthèse) Journal of Rheology Année : 2023

Cohesion and aggregates in unsaturated wet granular flows down a rough incline

Stephanie Deboeuf

Résumé

Multi-phase flows, encountered in nature or in industry, exhibit non-trivial rheological properties, that we attempt to better understand thanks to model materials and appropriate rheometers. Unsaturated wet granular flows down a rough inclined plane turn out to be steady and uniform for a wide range of parameters, despite the cohesion and the grain aggregates. The cohesive Mohr-Coulomb yield criterion extended to inertial granular flows, with a cohesion stress dependent on the liquid content and an internal friction coefficient dependent on the inertial number, allows for predictions in good agreement with our experimental measurements, when one introduces a grain aggregate size, which defines the appropriate length and relaxation time scales in the inertial number. We found that the grain aggregate size depends not monotonically on the liquid content and does not scale with the cohesion length induced by the cohesion stress, due to the non-trivial distribution of the liquid within the granular material.
Fichier principal
Vignette du fichier
JOR2022_GranuWet_reresubm.pdf (1.06 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03266242 , version 1 (20-10-2023)

Identifiants

Citer

Stephanie Deboeuf, Abdoulaye Fall. Cohesion and aggregates in unsaturated wet granular flows down a rough incline. Journal of Rheology, 2023, 67 (4), pp.909. ⟨10.1122/8.0000631⟩. ⟨hal-03266242⟩
127 Consultations
92 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More