Flow rate of polygonal grains through a bottleneck: interplay between shape and size

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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, as observed by other authors. We show that both the exit velocity of the grains and the packing fraction are lo...

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Autores principales: Goldberg, Ezequiel, Carlevaro, Carlos Manuel, Pugnaloni, Luis Ariel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Física
Granular flow
Non-circular particles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85815
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85815
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Granular flow
Non-circular particles
spellingShingle Física
Granular flow
Non-circular particles
Goldberg, Ezequiel
Carlevaro, Carlos Manuel
Pugnaloni, Luis Ariel
Flow rate of polygonal grains through a bottleneck: interplay between shape and size
topic_facet Física
Granular flow
Non-circular particles
description 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, as observed by other authors. We show that both the exit velocity of the grains and the packing fraction are lower for polygons, which leads to the reduced flow rate. We point out the importance of the criteria used to define when two objects of different shape are considered to be of the same size. Depending on this criteria, the mass flow rate may vary significantly for some polygons. Moreover, the particle flow rate is non-trivially related to a combination of mass flow rate, particle shape and particle size. For some polygons, the particle flow rate may be lower or higher than that of the corresponding disks depending on the size comparison criteria.
format Articulo
Articulo
author Goldberg, Ezequiel
Carlevaro, Carlos Manuel
Pugnaloni, Luis Ariel
author_facet Goldberg, Ezequiel
Carlevaro, Carlos Manuel
Pugnaloni, Luis Ariel
author_sort Goldberg, Ezequiel
title Flow rate of polygonal grains through a bottleneck: interplay between shape and size
title_short Flow rate of polygonal grains through a bottleneck: interplay between shape and size
title_full Flow rate of polygonal grains through a bottleneck: interplay between shape and size
title_fullStr Flow rate of polygonal grains through a bottleneck: interplay between shape and size
title_full_unstemmed Flow rate of polygonal grains through a bottleneck: interplay between shape and size
title_sort flow rate of polygonal grains through a bottleneck: interplay between shape and size
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/85815
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AT carlevarocarlosmanuel flowrateofpolygonalgrainsthroughabottleneckinterplaybetweenshapeandsize
AT pugnaloniluisariel flowrateofpolygonalgrainsthroughabottleneckinterplaybetweenshapeandsize
bdutipo_str Repositorios
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