Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?

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We review some of the recent results obtained in MHD turbulence, as encountered in many astrophysical objects.We focus attention on the lack of universality in such flows, including in the simplest case (no externally imposed magnetic field, no forcing, unit magnetic Prandtl number). Several paramet...

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Autores principales: Pouquet, A., Brachet, M.-E., Lee, E., Mininni, P., Rosenberg, D., Uritsky, V.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2010
Materias:
(magnetohydrodynamics:) MHD
(Sun:) solar wind
ISM: magnetic fields
Magnetic fields
Stars: activity
Sun: flares
Turbulence
Waves
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS271_p304_Pouquet
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_17439213_v6_nS271_p304_Pouquet
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spelling paperaa:paper_17439213_v6_nS271_p304_Pouquet2023-06-12T16:51:12Z Lack of universality in mhd turbulence, and the possible emergence of a new paradigm? Proc. Int. Astron. Union 2010;6(S271):304-316 Pouquet, A. Brachet, M.-E. Lee, E. Mininni, P. Rosenberg, D. Uritsky, V. (magnetohydrodynamics:) MHD (Sun:) solar wind ISM: magnetic fields Magnetic fields Stars: activity Sun: flares Turbulence Waves We review some of the recent results obtained in MHD turbulence, as encountered in many astrophysical objects.We focus attention on the lack of universality in such flows, including in the simplest case (no externally imposed magnetic field, no forcing, unit magnetic Prandtl number). Several parameters can foster such a breakdown of classical Kolmogorov scaling, such as the presence of velocity-magnetic field correlations, or of magnetic helicity and the role of the interplay between nonlinear eddies and Alfven waves. A link with avalanche processes is also discussed. These findings have led to the conjecture of the emergence of a new paradigm for MHD turbulence, as a possibly unsettled competition between several dynamical phenomena. © International Astronomical Union 2011. Fil:Mininni, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS271_p304_Pouquet
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic (magnetohydrodynamics:) MHD
(Sun:) solar wind
ISM: magnetic fields
Magnetic fields
Stars: activity
Sun: flares
Turbulence
Waves
spellingShingle (magnetohydrodynamics:) MHD
(Sun:) solar wind
ISM: magnetic fields
Magnetic fields
Stars: activity
Sun: flares
Turbulence
Waves
Pouquet, A.
Brachet, M.-E.
Lee, E.
Mininni, P.
Rosenberg, D.
Uritsky, V.
Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
topic_facet (magnetohydrodynamics:) MHD
(Sun:) solar wind
ISM: magnetic fields
Magnetic fields
Stars: activity
Sun: flares
Turbulence
Waves
description We review some of the recent results obtained in MHD turbulence, as encountered in many astrophysical objects.We focus attention on the lack of universality in such flows, including in the simplest case (no externally imposed magnetic field, no forcing, unit magnetic Prandtl number). Several parameters can foster such a breakdown of classical Kolmogorov scaling, such as the presence of velocity-magnetic field correlations, or of magnetic helicity and the role of the interplay between nonlinear eddies and Alfven waves. A link with avalanche processes is also discussed. These findings have led to the conjecture of the emergence of a new paradigm for MHD turbulence, as a possibly unsettled competition between several dynamical phenomena. © International Astronomical Union 2011.
format Artículo
Artículo
publishedVersion
author Pouquet, A.
Brachet, M.-E.
Lee, E.
Mininni, P.
Rosenberg, D.
Uritsky, V.
author_facet Pouquet, A.
Brachet, M.-E.
Lee, E.
Mininni, P.
Rosenberg, D.
Uritsky, V.
author_sort Pouquet, A.
title Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
title_short Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
title_full Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
title_fullStr Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
title_full_unstemmed Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
title_sort lack of universality in mhd turbulence, and the possible emergence of a new paradigm?
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS271_p304_Pouquet
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