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Journal Articles Astronomical Notes / Astronomische Nachrichten Year : 2007

Energy distribution in nonaxisymmetric magnetic Taylor-Couette flow

Abstract

Azimuthal magnetorotational instability is a mechanism that generates nonaxisymmetric field pattern. Nonlinear simulations in an infinite Taylor-Couette system with current-free external field show, that not only the linearly unstable mode m = 1 appears, but also an inverse cascade transporting energy into the axisymmetric field is possible. By varying the Reynolds number of the flow and the Hartmann number for the magnetic field, we find that the ratio between axisymmetric (m = 0) and dominating nonaxisymmetric mode (m = 1) can be nearly free chosen. On the surface of the outer cylinder this mode distribution appears similarly, but with weaker axisymmetric fields.We do not find significant differences in the case that a constant current within the flow is added. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Dates and versions

insu-00346071 , version 1 (11-12-2008)

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Cite

M. Gellert, G. Rudiger, Alexandre Fournier. Energy distribution in nonaxisymmetric magnetic Taylor-Couette flow. Astronomical Notes / Astronomische Nachrichten, 2007, 328 (10), pp.1162 à 1165. ⟨10.1002/asna.200710862⟩. ⟨insu-00346071⟩
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