Preferential concentration of heavy particles in turbulence

Particle-laden flows are of relevant interest in many industrial and natural systems. When the carrier flow is turbulent, a striking feature is the phenomenon called preferential concentration: particles denser than the fluid have the tendency to inhomogeneously distribute in space, forming clusters...

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Autores: Obligado, Martín, Teitelbaum, Tomas, Cartellier, Alain, Mininni, Pablo Daniel, Bourgoin, Mickael
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/17905
Acesso em linha:http://hdl.handle.net/11336/17905
Access Level:acceso abierto
Palavra-chave:Turbulence
Lagrangian Particles
Heavy Particles
Wind Tunnel Turbulence
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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network_acronym_str AR
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repository_id_str
spelling Preferential concentration of heavy particles in turbulenceObligado, MartínTeitelbaum, TomasCartellier, AlainMininni, Pablo DanielBourgoin, MickaelTurbulenceLagrangian ParticlesHeavy ParticlesWind Tunnel Turbulencehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Particle-laden flows are of relevant interest in many industrial and natural systems. When the carrier flow is turbulent, a striking feature is the phenomenon called preferential concentration: particles denser than the fluid have the tendency to inhomogeneously distribute in space, forming clusters and depleted regions. We present an investigation of clustering of small water droplets in homogeneous and isotropic active-grid-generated turbulence. We investigate the effect of Reynolds number (Rλ) and Stokes number (St) on particles clustering in the range Rλ ∼ 200−400 and St ∼ 2−10. Using Voronoï diagrams, we characterise clustering level and cluster properties (geometry, typical dimension and fractality). The exact same Voronoï analysis is then applied to investigate clustering properties of specific topological points of the velocity field of homogeneous isotropic turbulence obtained from direct numerical simulations at Rλ ∼ 220 and 300. The goal is to compare clustering properties of actual particles with those of such points in order to explore the relevance of possible clustering mechanisms, including centrifugal effects (heavy particles sampling preferentially low-vorticity regions) and sweep-stick mechanisms (heavy particles preferentially sticking to low-acceleration points). Our study points towards a leading role of zero-acceleration points and sweep-stick effects, at least for the experimental conditions considered in this study.Fil: Obligado, Martín. Imperial College London; Reino UnidoFil: Teitelbaum, Tomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Cartellier, Alain. Universite de Grenoble; FranciaFil: Mininni, Pablo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Bourgoin, Mickael. Universite de Grenoble; FranciaTaylor & Francis2014-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17905Obligado, Martín; Teitelbaum, Tomas; Cartellier, Alain; Mininni, Pablo Daniel; Bourgoin, Mickael; Preferential concentration of heavy particles in turbulence; Taylor & Francis; Journal Of Turbulence; 15; 5; 5-2014; 293-3101468-5248enginfo:eu-repo/semantics/altIdentifier/doi/10.1080/14685248.2014.897710info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/14685248.2014.897710info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:33:50Zoai:ri.conicet.gov.ar:11336/17905instacron: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:34982024-05-08 13:33:51.003CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Preferential concentration of heavy particles in turbulence
title Preferential concentration of heavy particles in turbulence
spellingShingle Preferential concentration of heavy particles in turbulence
Obligado, Martín
Turbulence
Lagrangian Particles
Heavy Particles
Wind Tunnel Turbulence
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Preferential concentration of heavy particles in turbulence
title_full Preferential concentration of heavy particles in turbulence
title_fullStr Preferential concentration of heavy particles in turbulence
title_full_unstemmed Preferential concentration of heavy particles in turbulence
title_sort Preferential concentration of heavy particles in turbulence
dc.creator.none.fl_str_mv Obligado, Martín
Teitelbaum, Tomas
Cartellier, Alain
Mininni, Pablo Daniel
Bourgoin, Mickael
author Obligado, Martín
author_facet Obligado, Martín
Teitelbaum, Tomas
Cartellier, Alain
Mininni, Pablo Daniel
Bourgoin, Mickael
author_role author
author2 Teitelbaum, Tomas
Cartellier, Alain
Mininni, Pablo Daniel
Bourgoin, Mickael
author2_role author
author
author
author
dc.subject.none.fl_str_mv Turbulence
Lagrangian Particles
Heavy Particles
Wind Tunnel Turbulence
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Turbulence
Lagrangian Particles
Heavy Particles
Wind Tunnel Turbulence
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description Particle-laden flows are of relevant interest in many industrial and natural systems. When the carrier flow is turbulent, a striking feature is the phenomenon called preferential concentration: particles denser than the fluid have the tendency to inhomogeneously distribute in space, forming clusters and depleted regions. We present an investigation of clustering of small water droplets in homogeneous and isotropic active-grid-generated turbulence. We investigate the effect of Reynolds number (Rλ) and Stokes number (St) on particles clustering in the range Rλ ∼ 200−400 and St ∼ 2−10. Using Voronoï diagrams, we characterise clustering level and cluster properties (geometry, typical dimension and fractality). The exact same Voronoï analysis is then applied to investigate clustering properties of specific topological points of the velocity field of homogeneous isotropic turbulence obtained from direct numerical simulations at Rλ ∼ 220 and 300. The goal is to compare clustering properties of actual particles with those of such points in order to explore the relevance of possible clustering mechanisms, including centrifugal effects (heavy particles sampling preferentially low-vorticity regions) and sweep-stick mechanisms (heavy particles preferentially sticking to low-acceleration points). Our study points towards a leading role of zero-acceleration points and sweep-stick effects, at least for the experimental conditions considered in this study.
publishDate 2014
dc.date.none.fl_str_mv 2014-05
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/11336/17905
Obligado, Martín; Teitelbaum, Tomas; Cartellier, Alain; Mininni, Pablo Daniel; Bourgoin, Mickael; Preferential concentration of heavy particles in turbulence; Taylor & Francis; Journal Of Turbulence; 15; 5; 5-2014; 293-310
1468-5248
url http://hdl.handle.net/11336/17905
identifier_str_mv Obligado, Martín; Teitelbaum, Tomas; Cartellier, Alain; Mininni, Pablo Daniel; Bourgoin, Mickael; Preferential concentration of heavy particles in turbulence; Taylor & Francis; Journal Of Turbulence; 15; 5; 5-2014; 293-310
1468-5248
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/14685248.2014.897710
info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/14685248.2014.897710
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
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15,811543

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