Role of soft-iron impellers on the mode selection in the VKS dynamo experiment
Computational Physics
2012-08-08 v2 Fluid Dynamics
Abstract
A crucial point for the understanding of the von-K\'arm\'an-Sodium (VKS) dynamo experiment is the influence of soft-iron impellers. We present numerical simulations of a VKS-like dynamo with a localized permeability distribution that resembles the shape of the flow driving impellers. It is shown that the presence of soft-iron material essentially determines the dynamo process in the VKS experiment. % An axisymmetric magnetic field mode can be explained by the combined action of the soft-iron disk and a rather small -effect parametrizing the induction effects of unresolved small scale flow fluctuations.
Keywords
Cite
@article{arxiv.0907.0123,
title = {Role of soft-iron impellers on the mode selection in the VKS dynamo experiment},
author = {Andre Giesecke and Frank Stefani and Gunter Gerbeth},
journal= {arXiv preprint arXiv:0907.0123},
year = {2012}
}