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
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 http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS271_p304_Pouquet_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_17439213_v6_nS271_p304_Pouquet_oai
record_format	dspace
spelling	I28-R145-paper_17439213_v6_nS271_p304_Pouquet_oai2020-10-19 Pouquet, A. Brachet, M.-E. Lee, E. Mininni, P. Rosenberg, D. Uritsky, V. 2010 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. application/pdf http://hdl.handle.net/20.500.12110/paper_17439213_v6_nS271_p304_Pouquet info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Proc. Int. Astron. Union 2010;6(S271):304-316 (magnetohydrodynamics:) MHD (Sun:) solar wind ISM: magnetic fields Magnetic fields Stars: activity Sun: flares Turbulence Waves Lack of universality in mhd turbulence, and the possible emergence of a new paradigm? info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS271_p304_Pouquet_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
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 http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17439213_v6_nS271_p304_Pouquet_oai
work_keys_str_mv	AT pouqueta lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm AT brachetme lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm AT leee lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm AT mininnip lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm AT rosenbergd lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm AT uritskyv lackofuniversalityinmhdturbulenceandthepossibleemergenceofanewparadigm
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Lack of universality in mhd turbulence, and the possible emergence of a new paradigm?

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