https://doi.org/10.1051/epjconf/201714003005
Dry granular flows – rheological measurements of the μ(I) – Rheology
1 Laboratoire NAVIER, UMR 8205 CNRS-ENPC-IFSTTAR, 2 Allée Kepler 77420 Champs sur Marne, France
2 CNRS, LOF, UMR 5258, 33600 Pessac, France
* Corresponding author: abdoulaye.fall@ifsttar.fr
Published online: 30 June 2017
Granular materials do not always flow homogeneously like fluids when submitted to external stress, but often form rigid regions that are separated by narrow shear bands where the material yields and flows. This shear localization impacts their apparent rheology, which makes it difficult to infer a constitutive behavior from conventional rheometric measurements. Moreover, they present a dilatant behavior, which makes their study in classical fixed-volume geometries difficult. These features led numerous groups to perform extensive studies with inclined plane flows, which were of crucial importance for the development and the validation of the μ(I)-rheology. Our aim is to develop a method to characterize granular materials with rheometrical tools. Using rheometry measurements in an annular shear cell, dense granular flows of 0.5mm spherical and monodisperse beads are studied. A focus is placed on the comparison between the present results and the μ(I)-rheology.
© 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.
