Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number

Autores
Feraco, F.; Marino, R.; Pumir, A.; Primavera, L.; Mininni, Pablo Daniel; Pouquet, A.; Rosenberg, Duane
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from direct numerical simulations of the Boussinesq equations with periodic boundary conditions, in a parameter space relevant for the atmosphere and the oceans. Over a range of Froude numbers of geophysical interest (≈ 0.05-0.3) we observe very large fluctuations of the vertical components of the velocity and the potential temperature, localized in space and time, with a sharp transition leading to non-Gaussian wings of the probability distribution functions. This behavior is captured by a simple model representing the competition between gravity waves on a fast time scale and nonlinear steepening on a slower time scale. The existence of a resonant regime characterized by enhanced large-scale intermittency, as understood within the framework of the proposed model, is then linked to the emergence of structures in the velocity and potential temperature fields, localized overturning and mixing. Finally, in the same regime we observe a linear scaling of the mixing efficiency with the Froude number and an increase of its value of roughly one order of magnitude.
Fil: Feraco, F.. Université Claude Bernard Lyon 1; Francia. Università della Calabria; Italia. Centre National de la Recherche Scientifique; Francia
Fil: Marino, R.. Université Claude Bernard Lyon 1; Francia
Fil: Pumir, A.. Université Claude Bernard Lyon 1; Francia. Centre National de la Recherche Scientifique; Francia. Max Planck Institut für Dynamik und Selbstorganisation Göttingen; Alemania
Fil: Primavera, L.. Università della Calabria; Italia
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: Pouquet, A.. National Center for Atmospheric Research; Estados Unidos. State University of Colorado at Boulder; Estados Unidos
Fil: Rosenberg, Duane. No especifica;
Materia
TURBULENCE
STRATIFICATION
ATMOSPHERIC FLOWS
EXTREME EVENTS
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:11336/96769
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/96769
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude numberFeraco, F.Marino, R.Pumir, A.Primavera, L.Mininni, Pablo DanielPouquet, A.Rosenberg, DuaneTURBULENCESTRATIFICATIONATMOSPHERIC FLOWSEXTREME EVENTShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from direct numerical simulations of the Boussinesq equations with periodic boundary conditions, in a parameter space relevant for the atmosphere and the oceans. Over a range of Froude numbers of geophysical interest (≈ 0.05-0.3) we observe very large fluctuations of the vertical components of the velocity and the potential temperature, localized in space and time, with a sharp transition leading to non-Gaussian wings of the probability distribution functions. This behavior is captured by a simple model representing the competition between gravity waves on a fast time scale and nonlinear steepening on a slower time scale. The existence of a resonant regime characterized by enhanced large-scale intermittency, as understood within the framework of the proposed model, is then linked to the emergence of structures in the velocity and potential temperature fields, localized overturning and mixing. Finally, in the same regime we observe a linear scaling of the mixing efficiency with the Froude number and an increase of its value of roughly one order of magnitude.Fil: Feraco, F.. Université Claude Bernard Lyon 1; Francia. Università della Calabria; Italia. Centre National de la Recherche Scientifique; FranciaFil: Marino, R.. Université Claude Bernard Lyon 1; FranciaFil: Pumir, A.. Université Claude Bernard Lyon 1; Francia. Centre National de la Recherche Scientifique; Francia. Max Planck Institut für Dynamik und Selbstorganisation Göttingen; AlemaniaFil: Primavera, L.. Università della Calabria; ItaliaFil: 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: Pouquet, A.. National Center for Atmospheric Research; Estados Unidos. State University of Colorado at Boulder; Estados UnidosFil: Rosenberg, Duane. No especifica; Europhysics Letters2018-08info: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/11336/96769Feraco, F.; Marino, R.; Pumir, A.; Primavera, L.; Mininni, Pablo Daniel; et al.; Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number; Europhysics Letters; Europhysics Letters; 123; 4; 8-2018; 1-80295-5075CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1209/0295-5075/123/44002info:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/123/44002info:eu-repo/semantics/altIdentifier/url/arxiv.org/pdf/1806.00342.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:03:49Zoai:ri.conicet.gov.ar:11336/96769instacron: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 10:03:50.151CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
title Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
spellingShingle Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
Feraco, F.
TURBULENCE
STRATIFICATION
ATMOSPHERIC FLOWS
EXTREME EVENTS
title_short Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
title_full Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
title_fullStr Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
title_full_unstemmed Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
title_sort Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
dc.creator.none.fl_str_mv Feraco, F.
Marino, R.
Pumir, A.
Primavera, L.
Mininni, Pablo Daniel
Pouquet, A.
Rosenberg, Duane
author Feraco, F.
author_facet Feraco, F.
Marino, R.
Pumir, A.
Primavera, L.
Mininni, Pablo Daniel
Pouquet, A.
Rosenberg, Duane
author_role author
author2 Marino, R.
Pumir, A.
Primavera, L.
Mininni, Pablo Daniel
Pouquet, A.
Rosenberg, Duane
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv TURBULENCE
STRATIFICATION
ATMOSPHERIC FLOWS
EXTREME EVENTS
topic TURBULENCE
STRATIFICATION
ATMOSPHERIC FLOWS
EXTREME EVENTS
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 investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from direct numerical simulations of the Boussinesq equations with periodic boundary conditions, in a parameter space relevant for the atmosphere and the oceans. Over a range of Froude numbers of geophysical interest (≈ 0.05-0.3) we observe very large fluctuations of the vertical components of the velocity and the potential temperature, localized in space and time, with a sharp transition leading to non-Gaussian wings of the probability distribution functions. This behavior is captured by a simple model representing the competition between gravity waves on a fast time scale and nonlinear steepening on a slower time scale. The existence of a resonant regime characterized by enhanced large-scale intermittency, as understood within the framework of the proposed model, is then linked to the emergence of structures in the velocity and potential temperature fields, localized overturning and mixing. Finally, in the same regime we observe a linear scaling of the mixing efficiency with the Froude number and an increase of its value of roughly one order of magnitude.
Fil: Feraco, F.. Université Claude Bernard Lyon 1; Francia. Università della Calabria; Italia. Centre National de la Recherche Scientifique; Francia
Fil: Marino, R.. Université Claude Bernard Lyon 1; Francia
Fil: Pumir, A.. Université Claude Bernard Lyon 1; Francia. Centre National de la Recherche Scientifique; Francia. Max Planck Institut für Dynamik und Selbstorganisation Göttingen; Alemania
Fil: Primavera, L.. Università della Calabria; Italia
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: Pouquet, A.. National Center for Atmospheric Research; Estados Unidos. State University of Colorado at Boulder; Estados Unidos
Fil: Rosenberg, Duane. No especifica;
description We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from direct numerical simulations of the Boussinesq equations with periodic boundary conditions, in a parameter space relevant for the atmosphere and the oceans. Over a range of Froude numbers of geophysical interest (≈ 0.05-0.3) we observe very large fluctuations of the vertical components of the velocity and the potential temperature, localized in space and time, with a sharp transition leading to non-Gaussian wings of the probability distribution functions. This behavior is captured by a simple model representing the competition between gravity waves on a fast time scale and nonlinear steepening on a slower time scale. The existence of a resonant regime characterized by enhanced large-scale intermittency, as understood within the framework of the proposed model, is then linked to the emergence of structures in the velocity and potential temperature fields, localized overturning and mixing. Finally, in the same regime we observe a linear scaling of the mixing efficiency with the Froude number and an increase of its value of roughly one order of magnitude.
publishDate 2018
dc.date.none.fl_str_mv 2018-08
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/11336/96769
Feraco, F.; Marino, R.; Pumir, A.; Primavera, L.; Mininni, Pablo Daniel; et al.; Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number; Europhysics Letters; Europhysics Letters; 123; 4; 8-2018; 1-8
0295-5075
CONICET Digital
CONICET
url http://hdl.handle.net/11336/96769
identifier_str_mv Feraco, F.; Marino, R.; Pumir, A.; Primavera, L.; Mininni, Pablo Daniel; et al.; Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number; Europhysics Letters; Europhysics Letters; 123; 4; 8-2018; 1-8
0295-5075
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1209/0295-5075/123/44002
info:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/123/44002
info:eu-repo/semantics/altIdentifier/url/arxiv.org/pdf/1806.00342.pdf
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 Europhysics Letters
publisher.none.fl_str_mv Europhysics Letters
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_ 1842269822224695296
score 12.885934

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