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dc.contributor.author
Dmitruk, Pablo Ariel
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Mininni, Pablo Daniel
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Pouquet, A.
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Servidio, S.
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Matthaeus, W.H.
dc.date.available
2018-08-24T17:09:25Z
dc.date.issued
2011-06
dc.identifier.citation
Dmitruk, Pablo Ariel; Mininni, Pablo Daniel; Pouquet, A.; Servidio, S.; Matthaeus, W.H.; Emergence of very long time fluctuations and 1/f noise in ideal flows; American Physical Society; Physical Review E: Statistical, Nonlinear and Soft Matter Physics; 83; 6; 6-2011; 6631801-6631815
dc.identifier.issn
1539-3755
dc.identifier.uri
http://hdl.handle.net/11336/57007
dc.description.abstract
This paper shows the connection between three previously observed but seemingly unrelated phenomena in hydrodynamic (HD) and magnetohydrodynamic (MHD) turbulent flows, involving the emergence of fluctuations occurring on very long time scales: the low-frequency 1/f noise in the power frequency spectrum, the delayed ergodicity of complex valued amplitude fluctuations in wave number space, and the spontaneous flippings or reversals of large-scale fields. Direct numerical simulations of ideal MHD and HD are employed in three space dimensions, at low resolution, for long periods of time, and with high accuracy to study several cases: different geometries, presence of rotation and/or a uniform magnetic field, and different values of the associated conserved global quantities. It is conjectured that the origin of all these long-time phenomena is rooted in the interaction of the longest wavelength fluctuations available to the system, with fluctuations at much smaller scales. The strength of this nonlocal interaction is controlled either by the existence of conserved global quantities with a back-transfer in Fourier space or by the presence of a slow manifold in the dynamics. © 2011 American Physical Society.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Low Frequency Noise
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Slow Dynamics
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Turbulence
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Emergence of very long time fluctuations and 1/f noise in ideal 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
2018-08-23T19:08:24Z
dc.journal.volume
83
dc.journal.number
6
dc.journal.pagination
6631801-6631815
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Dmitruk, Pablo Ariel. 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
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Fil: Pouquet, A.. National Center for Atmospheric Research; Estados Unidos
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Fil: Servidio, S.. Universita Della Calabria;
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Fil: Matthaeus, W.H.. Bartol Research Institute;
dc.journal.title
Physical Review E: Statistical, Nonlinear and Soft Matter Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pre.aps.org/abstract/PRE/v83/i6/e066318
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevE.83.066318
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