EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||30 June 2017|
Modeling flow arrest using a non-local rheology?
Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7190, Institut Jean Le Rond ∂’Alembert, F-75005 Paris, France
Published online: 30 June 2017
Using an incompressible Navier-Stokes solver with a modified non-Newtonian viscosity, we implement the μ(I)-rheology and study the transient arrest for thick granular layers. In order to study the stopping height phenomenology Hstop, we implement the steady-state-only approximate version of the non-local model from [6, 7] and successfully incorporate this feature in the solver. We compare the velocity profiles for granular layer thicknesses close to Hstop given by the model with discrete simulations, and discuss the ability of the nonlocal model to describe the dynamics of the flow close to stopping height. We find that for flows with thickness close to Hstop, the velocity profiles given by the model do not reflect the behavior of discrete simulation: discrete velocity profiles remain self-similar when approaching Hstop, while the non-local rheology predicts a change of concavity near the bottom.
© The Authors, published by EDP Sciences, 2017
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.
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