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dc.contributor.author
Sujovolsky, Nicolás Eduardo
dc.contributor.author
Mininni, Pablo Daniel
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Pouquet, A.
dc.date.available
2023-08-14T14:05:08Z
dc.date.issued
2018-08
dc.identifier.citation
Sujovolsky, Nicolás Eduardo; Mininni, Pablo Daniel; Pouquet, A.; Generation of turbulence through frontogenesis in sheared stratified flows; American Institute of Physics; Physics of Fluids; 30; 8; 8-2018; 1-20
dc.identifier.issn
1070-6631
dc.identifier.uri
http://hdl.handle.net/11336/208128
dc.description.abstract
The large-scale structures in the ocean and the atmosphere are in geostrophic balance, and a conduit must be found to channel the energy to the small scales where it can be dissipated. In turbulence, this takes the form of an energy cascade, whereas a possible mechanism in a balanced flow is through the formation of fronts, a common occurrence in geophysics. We show that an iconic configuration in laboratory and numerical experiments for the study of turbulence, the so-called Taylor-Green or von Kármán swirling flow, can be suitably adapted to domains with large aspect ratios, leading to the creation of an imposed large-scale vertical shear. To this effect, we use direct numerical simulations of the Boussinesq equations without net rotation and with no small-scale modeling. Various grid spacings are used, up to 20482 × 256 spatial points. The grids are always isotropic, with box aspect ratios of either 1:4 or 1:8. We find that when shear and stratification are comparable, the imposed shear layer resulting from the forcing leads to the formation of fronts and filaments which destabilize and evolve into a turbulent flow in the bulk, with a sizable amount of dissipation and mixing, following a cycle of front creation, instability, and development of turbulence. The results depend on the vertical length scales of shear and stratification.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Institute of Physics
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ATMOSPHERIC FLOWS
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OCEANIC FLOWS
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FRONTOGENESIS
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TURBULENCE
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Física de los Fluidos y Plasma
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Generation of turbulence through frontogenesis in sheared stratified flows
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-22T17:37:43Z
dc.journal.volume
30
dc.journal.number
8
dc.journal.pagination
1-20
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Sujovolsky, Nicolás Eduardo. 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
dc.description.fil
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
dc.description.fil
Fil: Pouquet, A.. State University of Colorado at Boulder; Estados Unidos. National Center for Atmospheric Research; Estados Unidos
dc.journal.title
Physics of Fluids
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/https://aip.scitation.org/doi/10.1063/1.5043293
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