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dc.contributor.author
Marino, Raffaele  
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Mininni, Pablo Daniel  
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Rosenberg, Duane  
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Pouquet, Annick  
dc.date.available
2015-06-09T17:55:35Z  
dc.date.issued
2013-03  
dc.identifier.citation
Marino, Raffaele; Mininni, Pablo Daniel; Rosenberg, Duane; Pouquet, Annick; Emergence of helicity in rotating stratified turbulence; Amer Physical Soc; Physical Review E; 87; 3; 3-2013; 033016(9);  
dc.identifier.issn
1539-3755  
dc.identifier.uri
http://hdl.handle.net/11336/650  
dc.description.abstract
We perform numerical simulations of decaying rotating stratified turbulence and show, in the Boussinesq framework, that helicity (velocity-vorticity correlation), as observed in supercell storms and hurricanes, is spontaneously created due to an interplay between buoyancy and rotation common to large-scale atmospheric and oceanic flows. Helicity emerges from the joint action of eddies and of inertia-gravity waves (with inertia and gravity with respective associated frequencies f and N), and it occurs when the waves are sufficiently strong. For N/ f <3 the amount of helicity produced is correctly predicted by a quasilinear balance equation. Outside this regime, and up to the highest Reynolds number obtained in this study, namely Re≈10 000, helicity production is found to be persistent forN/f as large as ≈17, and for ReFr 2 and ReRo 2, respectively, as large as ≈100 and ≈24000.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Amer Physical Soc  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Rotating Flows  
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Stratified Flows  
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Helicity  
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Geostrophy  
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Ciencias Naturales y Exactas  
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Ciencias Físicas  
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Física de Los Fluidos y Plasma  
dc.title
Emergence of helicity in rotating stratified turbulence  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2016-03-30 10:35:44.97925-03  
dc.journal.volume
87  
dc.journal.number
3  
dc.journal.pagination
033016(9)  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
New York  
dc.description.fil
Fil: Marino, Raffaele. National Center for Atmospheric Research; Estados Unidos de América;  
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Fil: Mininni, Pablo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina;  
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Fil: Rosenberg, Duane. National Center for Computational Sciences. Oak Ridge National Laboratory; Estados Unidos de América;  
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Fil: Pouquet, Annick. Department of Applied Mathematics. University of Colorado at Boulder; Estados Unidos de América;  
dc.journal.title
Physical Review E  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevE.87.033016