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dc.contributor.author
Alexakis, A.  
dc.contributor.author
Mininni, Pablo Daniel  
dc.contributor.author
Pouquet, A.  
dc.date.available
2019-01-09T17:23:44Z  
dc.date.issued
2007-12  
dc.identifier.citation
Alexakis, A.; Mininni, Pablo Daniel; Pouquet, A.; Turbulent cascades, transfer, and scale interactions in magnetohydrodynamics; IOP Publishing; New Journal of Physics; 9; 8; 12-2007; 2981-29820  
dc.identifier.issn
1367-2630  
dc.identifier.uri
http://hdl.handle.net/11336/67768  
dc.description.abstract
The nature of the interactions between different scales in magneto-hydrodynamic (MHD) turbulence is important for the understanding of the behaviour of magnetized astrophysical, geophysical and industrial flows in a turbulent state. In this paper, we review some recent results in the study of locality of interactions in turbulent flows and we address some of the questions that arise. We examine the cascade of ideal invariants in turbulent MHD flows by examining the transfer functions. We show new results indicating that the nonlocal behaviour of the energy transfer in MHD is the result of a correlation between the velocity and magnetic fields. This nonlocality disappears if we randomize the phases of the two fields keeping the hydrodynamic and magnetic helicities fixed. The cascade of magnetic helicity is also investigated, with special focus on the fate of the small-scale helicity and its coupling with the large-scale flow. These results have implications for dynamo action, in particular for the commonly used distinction between large- and small-scale dynamos. The long-range interactions that exist in MHD flows also raise the question of the existence of universality in MHD, both in the kinematic dynamo regime as well as in the turbulent steady state. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
IOP Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject.classification
Astronomía  
dc.subject.classification
Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Turbulent cascades, transfer, and scale interactions in magnetohydrodynamics  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-01-09T14:23:43Z  
dc.journal.volume
9  
dc.journal.number
8  
dc.journal.pagination
2981-29820  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Alexakis, A.. National Center for Atmospheric Research; Estados Unidos  
dc.description.fil
Fil: Mininni, Pablo Daniel. National Center for Atmospheric Research; Estados Unidos. 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.. National Center for Atmospheric Research; Estados Unidos  
dc.journal.title
New Journal of Physics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/1367-2630/9/8/298