Reference : DEM simulation of dense granular flows in a vane shear cell: Kinematics and rheologic...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
Computational Sciences; Physics and Materials Science
http://hdl.handle.net/10993/42911
DEM simulation of dense granular flows in a vane shear cell: Kinematics and rheological laws
English
Qi, Fenglei mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Kiesgen de Richter, Sebastien mailto []
Jenny, Mathieu mailto []
Peters, Bernhard mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
2020
Powder Technology
Elsevier
Yes (verified by ORBilu)
0032-5910
Lausanne
Netherlands
[en] Annular Couette cell ; Discrete element method (DEM) ; Extended kinetic theory ; Granular flow ; Rheology
[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.
University of Luxembourg: Luxembourg XDEM Research Centre - LuXDEM
the European programme Interreg VA GR
PowderReg
http://hdl.handle.net/10993/42911

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