Microscopic description of the granular fluidity field in nonlocal flow modeling

Q Zhang, K Kamrin - Physical review letters, 2017 - APS
A recent granular rheology based on an implicit “granular fluidity” field has been shown to
quantitatively predict many nonlocal phenomena. However, the physical nature of the field …

Influence of coarse-graining parameters on the analysis of DEM simulations of silo flow

T Weinhart, C Labra, S Luding, JY Ooi - Powder technology, 2016 - Elsevier
The discrete element method (DEM) is used extensively for the simulation of granular
materials and in powder technology. Averaging or coarse graining (CG) techniques, also …

A coupled CFD–DEM model for tumbling mill dynamics—Effect of lifter profile

A Mittal, M Kumar, N Mangadoddy - Powder Technology, 2024 - Elsevier
In comminution circuits, grinding is the most energy-intensive process. Although significant
work was focused on the charge particle dynamics via only DEM in the past, but lifter effects …

Experimental validation of DEM in rotating drums using Positron Emission Particle Tracking

TL Moodley, I Govender - Mechanics Research Communications, 2022 - Elsevier
Despite the widespread use of the Discrete Element Method (DEM) to simulate industrial
rotating drum flows, comparatively little work has been done to evaluate its accuracy. To …

Effective wall friction in wall-bounded 3D dense granular flows

R Artoni, P Richard - Physical review letters, 2015 - APS
We report numerical simulations on granular shear flows confined between two flat but
frictional sidewalls. Novel regimes differing by their strain localization features are observed …

Local rheology relation with variable yield stress ratio across dry, wet, dense, and dilute granular flows

T Pähtz, O Durán, DN De Klerk, I Govender… - Physical review letters, 2019 - APS
Dry, wet, dense, and dilute granular flows have been previously considered fundamentally
different and thus described by distinct, and in many cases incompatible, rheologies. We …

From discrete elements to continuum fields: Extension to bidisperse systems

DR Tunuguntla, AR Thornton, T Weinhart - Computational particle …, 2016 - Springer
Micro–macro transition methods can be used to, both, calibrate and validate continuum
models from discrete data obtained via experiments or simulations. These methods …

Flow in an hourglass: particle friction and stiffness matter

T Pongó, V Stiga, J Török, S Lévay, B Szabó… - New Journal of …, 2021 - iopscience.iop.org
Granular flow out of a silo is studied experimentally and numerically. The time evolution of
the discharge rate as well as the normal force (apparent weight) at the bottom of the …

Self-diffusion scalings in dense granular flows

R Artoni, M Larcher, JT Jenkins, P Richard - Soft Matter, 2021 - pubs.rsc.org
We report on measurements of self-diffusion coefficients in discrete numerical simulations of
steady, homogeneous, collisional shearing flows of nearly identical, frictional, inelastic …

Effect of Particle Shape on the Flow of an Hourglass

B Fan, T Pongó, R Cruz Hidalgo, T Börzsönyi - Physical Review Letters, 2024 - APS
The flow rate of a granulate out of a cylindrical container is studied as a function of particle
shape for flat and elongated ellipsoids experimentally and numerically. We find a …