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Energy distribution in nonaxisymmetric magnetic Taylor-Couette flow

✍ Scribed by M. Gellert; G. Rüdiger; A. Fournier

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
194 KB
Volume
328
Category
Article
ISSN
0004-6337

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✦ Synopsis

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)

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