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Apparent mass during silo discharge: Nonlinear effects related to filling protocols
(Elsevier Science Sa, 2017-04)
We study the evolution of the force exerted by a granular column on the bottom surface of a silo during its discharge. Previous to the discharge, we prepare the system using different filling procedures: distributed, i.e. ...
Enhanced run-out of dam-break granular flows caused by initial fluidization and initial material expansion
(Springer, 2016)
We report results of the run-out of experimental
dam-break flows in a horizontal channel generated from
the collapse of columns of fine (75 μm) particles fluidized
at various degrees. We find that the flow run-out (x) ...
Granular flow through an aperture: Influence of obstacles near the outlet
(American Physical Society, 2020-02)
We study how the presence of obstacles in a confined system of monodisperse disks affects their discharge through an aperture. The disks are driven by a horizontal conveyor belt that moves at constant velocity. The mean ...
Laser speckle correlation applied to flow field measurements in granular media
(2006)
A laser speckle correlation method is developed to measure slow macroscopic flow fields in a randomly packed granular medium. The method is useful for planar geometry configurations like the one considered here, namely a ...
Self-diffusion of particles in gas-driven granular layers with periodic flow modulation
(2005)
We study self-diffusion of particles in gas-driven granular layers by high-speed fluorescent video microscopy. We show that periodic flow modulation results in an enhancement of the particle's diffusion. The diffusion ...
Simulation of granular flows with the material point method
(UniandesMaestría en Ingeniería CivilFacultad de IngenieríaDepartamento de Ingeniería Civil y Ambiental, 2018)
El objetivo principal de esta tesis es investigar la distribución y continuidad de la presión y las partículas de flujos transicionales granulares usando Material Point Method (MPM). Ademas, el papel de la fase liquida en ...
Estudio del comportamiento de chorros granulares bajo rotación
(2012-06-19)
El estudio que se presenta en esta tesis sobre flujos granulares generados por la
rotación de tubos y discos, pretende contribuir a las investigaciones que se han
realizado para entender el ...