Subcritical dynamo bifurcation in the Taylor Green flow
Fluid Dynamics
2009-11-13 v2 Astrophysics
Abstract
We report direct numerical simulations of dynamo generation for flow generated using a Taylor-Green forcing. We find that the bifurcation is subcritical, and show its bifurcation diagram. We connect the associated hysteretic behavior with hydrodynamics changes induced by the action of the Lorentz force. We show the geometry of the dynamo magnetic field and discuss how the dynamo transition can be induced when an external field is applied to the flow.
Cite
@article{arxiv.0707.2498,
title = {Subcritical dynamo bifurcation in the Taylor Green flow},
author = {Yannick Ponty and Jean-Phillipe Laval and Berengere Dubrulle and François Daviaud and Jean-François Pinton},
journal= {arXiv preprint arXiv:0707.2498},
year = {2009}
}
Comments
4 pages