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Clogging transition of many particle systems flowing through bottlenecks
(Scientific Reports, 2014)
When a large set of discrete bodies passes through a bottleneck, the flow may become intermittent due to the development of clogs that obstruct the constriction. Clogging is observed, for instance, in colloidal suspensions, ...
Ergodic nonergodic transition in tapped granular systems; The role of persistent contacts
(Papers in Physics, 2016)
Static granular packs have been studied in the last three decades in the frame of a modi ed equilibrium statistical mechanics that assumes ergodicity as a basic postulate. The canonical example on which this framework is ...
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. ...
Tapped granular packings described as complex networks
(Taylor and Francis, 2013)
We characterize the structure of simulated two-dimensional granular packings using con- cepts from complex networks theory. The packings are generated by a simulated tapping protocol, which allows us to obtain states in ...
First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
(Journal of Physics: Condensed Matter, 2014)
The adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having ...
Relevance of system size to the steady state properties of tapped granular systems
(American Physical Society, 2015)
We investigate the steady-state packing fraction ϕ and force moment tensor Σ of quasi-two-dimensional granular columns subjected to tapping. Systems of different height h and width L are considered. We find that ϕ and Σ, ...
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. ...
Dynamic transition in conveyor belt driven granular flow
(Elsevier, 2015)
We consider the flow of disks of diameter d driven by a conveyor belt of dynamic friction coefficient μ through an aperture on a flat barrier. The flow rate presents two distinct regimes. At low belt velocities v the flow ...
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 ...