Maximization of granular outflow by oblique exits and by obstacles

Bjöm Zelinski; Eric Goles; Mario Markus

doi:10.1063/1.3103329

Maximization of granular outflow by oblique exits and by obstacles

Bjöm Zelinski, Eric Goles, Mario Markus

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We investigate experimentally the intermittent discharge of a granular medium out of an exit at the bottom of a vertically shaken box. Changing the orientation of the bottom shows that there exists an angle (around 20°-25° with respect to the horizontal) at which the mean discharge rate increases up to a factor 1.9, as compared to the rate with horizontal bottom. Furthermore, adjusting the diameter and the distance of a cylindrical obstacle above the exit on the (horizontal) bottom, allows to optimize the mean rate of discharge up to 3.5 times the rate without obstacle.

Original language	English
Article number	031701
Journal	Physics of Fluids
Volume	21
Issue number	3
DOIs	https://doi.org/10.1063/1.3103329
State	Published - 2009
Externally published	Yes

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title = "Maximization of granular outflow by oblique exits and by obstacles",

abstract = "We investigate experimentally the intermittent discharge of a granular medium out of an exit at the bottom of a vertically shaken box. Changing the orientation of the bottom shows that there exists an angle (around 20°-25° with respect to the horizontal) at which the mean discharge rate increases up to a factor 1.9, as compared to the rate with horizontal bottom. Furthermore, adjusting the diameter and the distance of a cylindrical obstacle above the exit on the (horizontal) bottom, allows to optimize the mean rate of discharge up to 3.5 times the rate without obstacle.",

author = "Bj{\"o}m Zelinski and Eric Goles and Mario Markus",

note = "Funding Information: This work was supported by the FONDECYT (Fondo Nacional de Desarrollo Cient{\'i}fico y Tecnol{\'o}gico, Chile; Project No. 1070022) and Programa Basal (Centre for Mathematical Modeling, Universidad de Chile). M.M. thanks the hospitality of the Centre for Mathematical Modeling, Chile.",

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AU - Goles, Eric

AU - Markus, Mario

N1 - Funding Information: This work was supported by the FONDECYT (Fondo Nacional de Desarrollo Científico y Tecnológico, Chile; Project No. 1070022) and Programa Basal (Centre for Mathematical Modeling, Universidad de Chile). M.M. thanks the hospitality of the Centre for Mathematical Modeling, Chile.

PY - 2009

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N2 - We investigate experimentally the intermittent discharge of a granular medium out of an exit at the bottom of a vertically shaken box. Changing the orientation of the bottom shows that there exists an angle (around 20°-25° with respect to the horizontal) at which the mean discharge rate increases up to a factor 1.9, as compared to the rate with horizontal bottom. Furthermore, adjusting the diameter and the distance of a cylindrical obstacle above the exit on the (horizontal) bottom, allows to optimize the mean rate of discharge up to 3.5 times the rate without obstacle.

AB - We investigate experimentally the intermittent discharge of a granular medium out of an exit at the bottom of a vertically shaken box. Changing the orientation of the bottom shows that there exists an angle (around 20°-25° with respect to the horizontal) at which the mean discharge rate increases up to a factor 1.9, as compared to the rate with horizontal bottom. Furthermore, adjusting the diameter and the distance of a cylindrical obstacle above the exit on the (horizontal) bottom, allows to optimize the mean rate of discharge up to 3.5 times the rate without obstacle.

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Maximization of granular outflow by oblique exits and by obstacles

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