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Abstract:

A formulation of a kinematic dynamo is presented, based on a previously derived self-consistent procedure for obtaining large-scale models for complex system of equations. The model has only a small number of parametrized variables: the small-scale magnetic diffusivity, the scale of the large-scale fields, and a factor in the explicit expression of the αφφ component of the α tensor. Explicit expressions of what corresponds to the other components of the α tensor and of the diffusivity tensor are derived in terms of the large-scale meridional flow and of the differential rotation law, without introducing additional parameters. A very simple simulation of a solar-like dynamo, employing the model without meridional flow shows reasonable magnetic field evolution, with a cycle duration of about 2/3 that of the Sun, shift of the magnetic field from mid-latitudes towards the equator, poleward migration of the radial field at high latitudes, and correct phase relation between radial and azimuthal components. © 2016 The Authors.

Registro:

Documento: Artículo
Título:Large-scale model of the axisymmetric kinematic dynamo
Autor:Sraibman, L.; Minotti, F.
Filiación:Departamento de Física, Universidad de Buenos Aires, Instituto de Física del Plasma (INFIP), (CONICET-UBA), Buenos Aires, C1428EGA, Argentina
Palabras clave:Dynamo; Magnetic fields; MHD; Turbulence
Año:2016
Volumen:456
Número:4
Página de inicio:3715
Página de fin:3719
DOI: http://dx.doi.org/10.1093/mnras/stv2943
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v456_n4_p3715_Sraibman

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Citas:

---------- APA ----------
Sraibman, L. & Minotti, F. (2016) . Large-scale model of the axisymmetric kinematic dynamo. Monthly Notices of the Royal Astronomical Society, 456(4), 3715-3719.
http://dx.doi.org/10.1093/mnras/stv2943
---------- CHICAGO ----------
Sraibman, L., Minotti, F. "Large-scale model of the axisymmetric kinematic dynamo" . Monthly Notices of the Royal Astronomical Society 456, no. 4 (2016) : 3715-3719.
http://dx.doi.org/10.1093/mnras/stv2943
---------- MLA ----------
Sraibman, L., Minotti, F. "Large-scale model of the axisymmetric kinematic dynamo" . Monthly Notices of the Royal Astronomical Society, vol. 456, no. 4, 2016, pp. 3715-3719.
http://dx.doi.org/10.1093/mnras/stv2943
---------- VANCOUVER ----------
Sraibman, L., Minotti, F. Large-scale model of the axisymmetric kinematic dynamo. Mon. Not. R. Astron. Soc. 2016;456(4):3715-3719.
http://dx.doi.org/10.1093/mnras/stv2943