Velocity profiles in forced silo discharges

Autores
Madrid, Marcos Andres; Pugnaloni, Luis Ariel
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
When a granular material is freely discharged from a silo through an orifice at its base, the flow rate remains constant throughout the discharge. However, it has been recently shown that, if the discharge is forced by an overweight, the flow rate increases at the final stages of the discharge, in striking contrast to viscous fluids (Madrid et al. in Europhys Lett 123:14004, 2018). Although the general mechanism that drives this increase in the flow rate has been discussed, there exist yet a number of open questions regarding this phenomenon. One such questions is to what extent is the internal velocity profile affected, beyond the trivial overall increase consistent with the increasing flow rate. We study via discrete element method simulations the internal velocity profiles during forced silo discharges and compare them with those of free discharges. The changes in velocity profiles are somewhat subtle. Interestingly, during free discharges, while the velocity profiles are steady at the silo base and above a height equivalent to one silo diameter, there exists a transition region where the profile evolves in time, despite the constant flow rate. In contrast, forced discharges present steady profiles at all heights of the granular column during the initial constant flow phase, followed by an overall increase of the velocities when the acceleration phase develops.
Fil: Madrid, Marcos Andres. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; Argentina
Fil: Pugnaloni, Luis Ariel. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Confluencia; Argentina
Materia
FLOW PATTERN
FORCED FLOW
GRANULAR FLOW
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/147772
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Velocity profiles in forced silo dischargesMadrid, Marcos AndresPugnaloni, Luis ArielFLOW PATTERNFORCED FLOWGRANULAR FLOWhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1When a granular material is freely discharged from a silo through an orifice at its base, the flow rate remains constant throughout the discharge. However, it has been recently shown that, if the discharge is forced by an overweight, the flow rate increases at the final stages of the discharge, in striking contrast to viscous fluids (Madrid et al. in Europhys Lett 123:14004, 2018). Although the general mechanism that drives this increase in the flow rate has been discussed, there exist yet a number of open questions regarding this phenomenon. One such questions is to what extent is the internal velocity profile affected, beyond the trivial overall increase consistent with the increasing flow rate. We study via discrete element method simulations the internal velocity profiles during forced silo discharges and compare them with those of free discharges. The changes in velocity profiles are somewhat subtle. Interestingly, during free discharges, while the velocity profiles are steady at the silo base and above a height equivalent to one silo diameter, there exists a transition region where the profile evolves in time, despite the constant flow rate. In contrast, forced discharges present steady profiles at all heights of the granular column during the initial constant flow phase, followed by an overall increase of the velocities when the acceleration phase develops.Fil: Madrid, Marcos Andres. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; ArgentinaFil: Pugnaloni, Luis Ariel. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Confluencia; ArgentinaSpringer2019-07-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/147772Madrid, Marcos Andres; Pugnaloni, Luis Ariel; Velocity profiles in forced silo discharges; Springer; Granular Matter; 21; 3; 23-7-2019; 1-61434-76361434-5021CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s10035-019-0927-1info:eu-repo/semantics/altIdentifier/doi/10.1007/s10035-019-0927-1info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2005.06948info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:03Zoai:ri.conicet.gov.ar:11336/147772instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:03.777CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Velocity profiles in forced silo discharges
title Velocity profiles in forced silo discharges
spellingShingle Velocity profiles in forced silo discharges
Madrid, Marcos Andres
FLOW PATTERN
FORCED FLOW
GRANULAR FLOW
title_short Velocity profiles in forced silo discharges
title_full Velocity profiles in forced silo discharges
title_fullStr Velocity profiles in forced silo discharges
title_full_unstemmed Velocity profiles in forced silo discharges
title_sort Velocity profiles in forced silo discharges
dc.creator.none.fl_str_mv Madrid, Marcos Andres
Pugnaloni, Luis Ariel
author Madrid, Marcos Andres
author_facet Madrid, Marcos Andres
Pugnaloni, Luis Ariel
author_role author
author2 Pugnaloni, Luis Ariel
author2_role author
dc.subject.none.fl_str_mv FLOW PATTERN
FORCED FLOW
GRANULAR FLOW
topic FLOW PATTERN
FORCED FLOW
GRANULAR FLOW
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv When a granular material is freely discharged from a silo through an orifice at its base, the flow rate remains constant throughout the discharge. However, it has been recently shown that, if the discharge is forced by an overweight, the flow rate increases at the final stages of the discharge, in striking contrast to viscous fluids (Madrid et al. in Europhys Lett 123:14004, 2018). Although the general mechanism that drives this increase in the flow rate has been discussed, there exist yet a number of open questions regarding this phenomenon. One such questions is to what extent is the internal velocity profile affected, beyond the trivial overall increase consistent with the increasing flow rate. We study via discrete element method simulations the internal velocity profiles during forced silo discharges and compare them with those of free discharges. The changes in velocity profiles are somewhat subtle. Interestingly, during free discharges, while the velocity profiles are steady at the silo base and above a height equivalent to one silo diameter, there exists a transition region where the profile evolves in time, despite the constant flow rate. In contrast, forced discharges present steady profiles at all heights of the granular column during the initial constant flow phase, followed by an overall increase of the velocities when the acceleration phase develops.
Fil: Madrid, Marcos Andres. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; Argentina
Fil: Pugnaloni, Luis Ariel. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Confluencia; Argentina
description When a granular material is freely discharged from a silo through an orifice at its base, the flow rate remains constant throughout the discharge. However, it has been recently shown that, if the discharge is forced by an overweight, the flow rate increases at the final stages of the discharge, in striking contrast to viscous fluids (Madrid et al. in Europhys Lett 123:14004, 2018). Although the general mechanism that drives this increase in the flow rate has been discussed, there exist yet a number of open questions regarding this phenomenon. One such questions is to what extent is the internal velocity profile affected, beyond the trivial overall increase consistent with the increasing flow rate. We study via discrete element method simulations the internal velocity profiles during forced silo discharges and compare them with those of free discharges. The changes in velocity profiles are somewhat subtle. Interestingly, during free discharges, while the velocity profiles are steady at the silo base and above a height equivalent to one silo diameter, there exists a transition region where the profile evolves in time, despite the constant flow rate. In contrast, forced discharges present steady profiles at all heights of the granular column during the initial constant flow phase, followed by an overall increase of the velocities when the acceleration phase develops.
publishDate 2019
dc.date.none.fl_str_mv 2019-07-23
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/147772
Madrid, Marcos Andres; Pugnaloni, Luis Ariel; Velocity profiles in forced silo discharges; Springer; Granular Matter; 21; 3; 23-7-2019; 1-6
1434-7636
1434-5021
CONICET Digital
CONICET
url http://hdl.handle.net/11336/147772
identifier_str_mv Madrid, Marcos Andres; Pugnaloni, Luis Ariel; Velocity profiles in forced silo discharges; Springer; Granular Matter; 21; 3; 23-7-2019; 1-6
1434-7636
1434-5021
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s10035-019-0927-1
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10035-019-0927-1
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2005.06948
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.885934

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