https://doi.org/10.1051/epjconf/202124903044
Time scales and rheology of visco-cohesive granular flows
CNRS, LMGC, University of Montpellier, 163 rue Auguste Broussonnet, F-34095 Montpellier, France
* e-mail: franck.radjai@umontpellier.fr
Published online: 7 June 2021
In the presence of viscous and cohesive interactions between particles, a granular flow is governed by several characteristic time and stress scales that determine its rheological properties (shear stress, packing fraction, effective viscosities). In this paper, we revisit and extend the scaling arguments used previously for dry cohesionless granular flows and suspensions. We show that the rheology can be in principle described by a single dimensionless control parameter that includes all characteristic times. We also briefly present simulation results for 2D sheared suspensions and 3D wet granular flows where the effective friction coefficient and packing fraction are consistently described as functions of this unique control parameter.
A video is available at https://doi.org/10.48448/2vfd-4d39
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
