[en] The rheology of dense granular flows is investigated through discrete element method (DEM)
simulation of a vane shear cell. From the simulation, profiles of shear stress, shear rate, and
velocity are obtained, which demonstrates that the flow features in the vane shear cell are
equivalent to those in the classic annular Couette cell. A novel correlation for the shear
viscosity is formulated and leads to a new expression for μKT in the kinetic theory analysis.
The μKT formulation is able to qualitatively capture the μ-I relation in the shear cell. A
correlation length is added in the energy dissipation term to account for the effects of the
particle motion correlation. A simplified correlation length model is derived based on DEM
results and is compared with the literature. The modified granular kinetic energy equation
is able to correctly predict the granular temperature profiles in the shear cell.
Centre de recherche :
LuXDEM - University of Luxembourg: Luxembourg XDEM Research Centre
Disciplines :
Ingénierie chimique
Auteur, co-auteur :
QI, Fenglei ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Kiesgen de Richter, Sebastien
Jenny, Mathieu
PETERS, Bernhard ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
DEM simulation of dense granular flows in a vane shear cell: Kinematics and rheological laws
Date de publication/diffusion :
2020
Titre du périodique :
Powder Technology
ISSN :
0032-5910
eISSN :
1873-328X
Maison d'édition :
Elsevier, Lausanne, Pays-Bas
Peer reviewed :
Peer reviewed vérifié par ORBi
Focus Area :
Computational Sciences Physics and Materials Science
