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Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns
(Journal of Statistical Mechanics: Theory and Experiment, 2013)
We simulate, via a discrete element method, the tapping of a narrow column of disks under gravity. For frictionless disks, this system has a simple analytical expression for the density of states in the Edwards volume ...
Structure of force networks in tapped particulate systems of disks and pentagons I Clusters and loops
(American Physical Society, 2016)
The force network of a granular assembly, defined by the contact network and the corresponding contact
forces, carries valuable information about the state of the packing. Simple analysis of these networks based on the ...
Effect of particle shape and fragmentation on the response of particle dampers
(SAGE Publications, 2014)
A particle damper (PD) is a device that can attenuate mechanical vibrations thanks to the dissipative collisions between grains contained in a cavity attached to the vibrating structure. It has been recently suggested that, ...
Structure of force networks in tapped particulate systems of disks and pentagons II Persistence analysis
(American Physical Society, 2016)
In the companion paper [Pugnaloni et al., Phys. Rev. E 93, 062902 (2016)], we use classical measures based on force probability density functions (PDFs), as well as Betti numbers (quantifying the number of components, ...
Effect of grain shape on the jamming of two dimensional silos
(EPJ Web of Conferences, 2017)
We present discrete element method simulations of the discharge of silos in two dimensions. We study the effect of the grain shape on the clogging of small apertures, considering regular polygons and disks of equal mass. ...
Flow rate of polygonal grains through a bottleneck Interplay between shape and size
(Papers in Physics, 2015)
We report two-dimensional simulations of circular and polygonal grains passing through an aperture at the bottom of a silo. The mass flow rate for regular polygons is lower than for disks\red{,} as observed by other authors. ...
Intruder in a two-dimensional granular system: effects of dynamic and static basal friction on stick-slip and clogging dynamics
(2019-10-15)
We discuss the results of simulations of an intruder pulled through a two-dimensional granular system
by a spring, using a model designed to lend insight into the experimental findings described by Kozlowski
et al. [Phys. ...
On the use of magnetic particles to enhance the flow of vibrated grains through narrow apertures
(2021-06-28)
The ow of grains through narrow apertures posses an extraordinary challenge: clogging. Strategies to alleviate the effect of clogging, such as the use of external vibration, are always part of the design of machinery for ...
Stability and conductivity of proppant packs during flowback in unconventional reservoirs: a CFD–DEM simulation study
(Elsevier B.V., 2021)
We present simulations using a coupled Computational Fluid Dynamics–Discrete Element Method (CFD–DEM)
approach for a slurry of millimeter-sized particles in water which is squeezed between two walls and then made
flow ...
Universal features of the stick-slip dynamics of an intruder moving through a confined granular medium
(2022-04-21)
Experiments and simulations of an intruder dragged by a spring through a two-dimensional annulus of granular
material exhibit robust force fluctuations. At low packing fractions (φ < φ0), the intruder clears an open ...