Physics – Fluid Dynamics
Scientific paper
2009-05-25
Geophysical & Astrophysical Fluid Dynamics 104 (2010) 249-271
Physics
Fluid Dynamics
Scientific paper
10.1080/03091920903366303
In an attempt to understand why the dominating magnetic field observed in the von-K\'arm\'an-Sodium (VKS) dynamo experiment is axisymmetric, we investigate in the present paper the ability of mean field models to generate axisymmetric eigenmodes in cylindrical geometries. An $\alpha$-effect is added to the induction equation and we identify reasonable and necessary properties of the $\alpha$ distribution so that axisymmetric eigenmodes are generated. The parametric study is done with two different simulation codes. We find that simple distributions of $\alpha$-effect, either concentrated in the disk neighbourhood or occupying the bulk of the flow, require unrealistically large values of the parameter $\alpha$ to explain the VKS observations.
Gerbeth Gunter
Giesecke Alberto A.
Guermond Jean-Luc
Laguerre Raphael
Leorat Jacques
No associations
LandOfFree
Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generation of axisymmetric modes in cylindrical kinematic mean-field dynamos of VKS type will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-294281