Skip to Main content Skip to Navigation
Journal articles

Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type

Abstract : In an attempt to understand why the dominating magnetic field observed in the von-Kaacutermaacuten-sodium (VKS) dynamo experiment is axisymmetric, we investigate in the present article the ability of mean field models to generate axisymmetric eigenmodes in cylindrical geometries. An agr-effect is added to the induction equation and we identify reasonable and necessary properties of the agr distribution so that axisymmetric eigenmodes are generated. The parametric study is done with two different simulation codes. We find that simple distributions of agr-effect, either concentrated in the disk neighborhood or occupying the bulk of the flow, require unrealistically large values of the parameter agr to explain the VKS observations.
Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-00548627
Contributor : Pascale Talour <>
Submitted on : Monday, December 20, 2010 - 10:19:12 AM
Last modification on : Wednesday, October 14, 2020 - 4:06:24 AM

Links full text

Identifiers

Citation

A. Giesecke, C. Nore, F. Plunian, R. Laguerre, C. Ribeiro, et al.. Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type. Geophysical and Astrophysical Fluid Dynamics, Taylor & Francis, 2010, 104, pp.249-271. ⟨10.1080/03091920903366303⟩. ⟨insu-00548627⟩

Share

Metrics

Record views

597