Rotating helical turbulence. II. Intermittencyscale invarianceand structures

Autores
Mininni, P.D.; Pouquet, A.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics.
Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Phys. Fluids 2010;22(3):6-10
Materia
Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_10706631_v22_n3_p6_Mininni
Acceder
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oai_identifier_str paperaa:paper_10706631_v22_n3_p6_Mininni
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Rotating helical turbulence. II. Intermittencyscale invarianceand structuresMininni, P.D.Pouquet, A.Anti-symmetricDifferent orderHelical turbulenceHelicitiesHelicity cascadesIntermittencyRotating turbulenceScale invariantSelf-similaritiesSmall scaleStructure functionsTime-varying vorticesVelocity fieldVelocity incrementsComputer simulationRotationTurbulenceProbability density functionWe study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics.Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p6_MininniPhys. Fluids 2010;22(3):6-10reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-10-16T09:30:04Zpaperaa:paper_10706631_v22_n3_p6_MininniInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-10-16 09:30:05.726Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title Rotating helical turbulence. II. Intermittencyscale invarianceand structures
spellingShingle Rotating helical turbulence. II. Intermittencyscale invarianceand structures
Mininni, P.D.
Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
title_short Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_full Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_fullStr Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_full_unstemmed Rotating helical turbulence. II. Intermittencyscale invarianceand structures
title_sort Rotating helical turbulence. II. Intermittencyscale invarianceand structures
dc.creator.none.fl_str_mv Mininni, P.D.
Pouquet, A.
author Mininni, P.D.
author_facet Mininni, P.D.
Pouquet, A.
author_role author
author2 Pouquet, A.
author2_role author
dc.subject.none.fl_str_mv Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
topic Anti-symmetric
Different order
Helical turbulence
Helicities
Helicity cascades
Intermittency
Rotating turbulence
Scale invariant
Self-similarities
Small scale
Structure functions
Time-varying vortices
Velocity field
Velocity increments
Computer simulation
Rotation
Turbulence
Probability density function
dc.description.none.fl_txt_mv We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics.
Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description We study the intermittency properties of the energy and helicity cascades in two 15363 direct numerical simulations of helical rotating turbulence. Symmetric and antisymmetric velocity increments are examinedas well as probability density functions of the velocity field and of the helicity density. It is found that the direct cascade of energy to small scales is scale invariant and nonintermittentwhereas the direct cascade of helicity is highly intermittent. Furthermorethe study of structure functions of different orders allows us to identify a recovery of isotropy of strong events at very small scales in the flow. Finallywe observe the juxtaposition in space of strong laminar and persistent helical columns next to time-varying vortex tanglesthe former being associated with the self-similarity of energy and the latter with the intermittency of helicity. © 2010 American Institute of Physics.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/20.500.12110/paper_10706631_v22_n3_p6_Mininni
url http://hdl.handle.net/20.500.12110/paper_10706631_v22_n3_p6_Mininni
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Phys. Fluids 2010;22(3):6-10
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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score 12.712165

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