Clustering of vector nulls in homogeneous isotropic turbulence

Autores
Mora, D. O.; Bourgoin, M.; Mininni, Pablo Daniel; Obligado, M.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyze the vector nulls of velocity, Lagrangian acceleration, and vorticity, coming from direct numerical simulations of forced homogeneous isotropic turbulence at Reλ∈O([40-600]). We show that the clustering of velocity nulls is much stronger than those of acceleration and vorticity nulls. These acceleration and vorticity nulls, however, are denser than the velocity nulls. We study the scaling of clusters of these null points with Reλ and with characteristic turbulence lengthscales. We also analyze datasets of point inertial particles with Stokes numbers St=0.5, 3, and 6, at Reλ=240. Inertial particles display preferential concentration with a degree of clustering that resembles some properties of the clustering of the Lagrangian acceleration nulls, in agreement with the proposed sweep-stick mechanism of clustering formation.
Fil: Mora, D. O.. University of Washington; Estados Unidos. Universite Grenoble Alpes; Francia
Fil: Bourgoin, M.. Centre National de la Recherche Scientifique; Francia
Fil: 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; Argentina
Fil: Obligado, M.. Universite Grenoble Alpes; Francia
Materia
TURBULENCE
MULTIPHASE FLOWS
PARTICLES
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:11336/181443
Acceder
id CONICETDig_c7915cfff6a835a88d604b0bc87eeff9
oai_identifier_str oai:ri.conicet.gov.ar:11336/181443
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Clustering of vector nulls in homogeneous isotropic turbulenceMora, D. O.Bourgoin, M.Mininni, Pablo DanielObligado, M.TURBULENCEMULTIPHASE FLOWSPARTICLEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We analyze the vector nulls of velocity, Lagrangian acceleration, and vorticity, coming from direct numerical simulations of forced homogeneous isotropic turbulence at Reλ∈O([40-600]). We show that the clustering of velocity nulls is much stronger than those of acceleration and vorticity nulls. These acceleration and vorticity nulls, however, are denser than the velocity nulls. We study the scaling of clusters of these null points with Reλ and with characteristic turbulence lengthscales. We also analyze datasets of point inertial particles with Stokes numbers St=0.5, 3, and 6, at Reλ=240. Inertial particles display preferential concentration with a degree of clustering that resembles some properties of the clustering of the Lagrangian acceleration nulls, in agreement with the proposed sweep-stick mechanism of clustering formation.Fil: Mora, D. O.. University of Washington; Estados Unidos. Universite Grenoble Alpes; FranciaFil: Bourgoin, M.. Centre National de la Recherche Scientifique; 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: Obligado, M.. Universite Grenoble Alpes; FranciaAmerican Physical Society2021-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/181443Mora, D. O.; Bourgoin, M.; Mininni, Pablo Daniel; Obligado, M.; Clustering of vector nulls in homogeneous isotropic turbulence; American Physical Society; Physical Review Fluids; 6; 2; 2-2021; 1-162469-990XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevFluids.6.024609info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:14Zoai:ri.conicet.gov.ar:11336/181443instacron: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 10:01:14.852CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Clustering of vector nulls in homogeneous isotropic turbulence
title Clustering of vector nulls in homogeneous isotropic turbulence
spellingShingle Clustering of vector nulls in homogeneous isotropic turbulence
Mora, D. O.
TURBULENCE
MULTIPHASE FLOWS
PARTICLES
title_short Clustering of vector nulls in homogeneous isotropic turbulence
title_full Clustering of vector nulls in homogeneous isotropic turbulence
title_fullStr Clustering of vector nulls in homogeneous isotropic turbulence
title_full_unstemmed Clustering of vector nulls in homogeneous isotropic turbulence
title_sort Clustering of vector nulls in homogeneous isotropic turbulence
dc.creator.none.fl_str_mv Mora, D. O.
Bourgoin, M.
Mininni, Pablo Daniel
Obligado, M.
author Mora, D. O.
author_facet Mora, D. O.
Bourgoin, M.
Mininni, Pablo Daniel
Obligado, M.
author_role author
author2 Bourgoin, M.
Mininni, Pablo Daniel
Obligado, M.
author2_role author
author
author
dc.subject.none.fl_str_mv TURBULENCE
MULTIPHASE FLOWS
PARTICLES
topic TURBULENCE
MULTIPHASE FLOWS
PARTICLES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We analyze the vector nulls of velocity, Lagrangian acceleration, and vorticity, coming from direct numerical simulations of forced homogeneous isotropic turbulence at Reλ∈O([40-600]). We show that the clustering of velocity nulls is much stronger than those of acceleration and vorticity nulls. These acceleration and vorticity nulls, however, are denser than the velocity nulls. We study the scaling of clusters of these null points with Reλ and with characteristic turbulence lengthscales. We also analyze datasets of point inertial particles with Stokes numbers St=0.5, 3, and 6, at Reλ=240. Inertial particles display preferential concentration with a degree of clustering that resembles some properties of the clustering of the Lagrangian acceleration nulls, in agreement with the proposed sweep-stick mechanism of clustering formation.
Fil: Mora, D. O.. University of Washington; Estados Unidos. Universite Grenoble Alpes; Francia
Fil: Bourgoin, M.. Centre National de la Recherche Scientifique; Francia
Fil: 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; Argentina
Fil: Obligado, M.. Universite Grenoble Alpes; Francia
description We analyze the vector nulls of velocity, Lagrangian acceleration, and vorticity, coming from direct numerical simulations of forced homogeneous isotropic turbulence at Reλ∈O([40-600]). We show that the clustering of velocity nulls is much stronger than those of acceleration and vorticity nulls. These acceleration and vorticity nulls, however, are denser than the velocity nulls. We study the scaling of clusters of these null points with Reλ and with characteristic turbulence lengthscales. We also analyze datasets of point inertial particles with Stokes numbers St=0.5, 3, and 6, at Reλ=240. Inertial particles display preferential concentration with a degree of clustering that resembles some properties of the clustering of the Lagrangian acceleration nulls, in agreement with the proposed sweep-stick mechanism of clustering formation.
publishDate 2021
dc.date.none.fl_str_mv 2021-02
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/11336/181443
Mora, D. O.; Bourgoin, M.; Mininni, Pablo Daniel; Obligado, M.; Clustering of vector nulls in homogeneous isotropic turbulence; American Physical Society; Physical Review Fluids; 6; 2; 2-2021; 1-16
2469-990X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/181443
identifier_str_mv Mora, D. O.; Bourgoin, M.; Mininni, Pablo Daniel; Obligado, M.; Clustering of vector nulls in homogeneous isotropic turbulence; American Physical Society; Physical Review Fluids; 6; 2; 2-2021; 1-16
2469-990X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevFluids.6.024609
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 American Physical Society
publisher.none.fl_str_mv American Physical Society
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
_version_ 1842269685090877440
score 13.13397

Publicaciones similares