Generation of magnetic fields by large-scale vortices in rotating convection
Fluid Dynamics
2015-06-24 v1 Earth and Planetary Astrophysics
Abstract
We propose a new self-consistent dynamo mechanism for the generation of large-scale magnetic fields in natural objects. Recent computational studies have described the formation of large-scale vortices (LSVs) in rotating turbulent convection. Here we demonstrate that for magnetic Reynolds numbers below the threshold for small-scale dynamo action, such turbulent flows can sustain large-scale magnetic fields --- i.e. fields with a significant component on the scale of the system.
Keywords
Cite
@article{arxiv.1503.08599,
title = {Generation of magnetic fields by large-scale vortices in rotating convection},
author = {Celine Guervilly and David W. Hughes and Chris A. Jones},
journal= {arXiv preprint arXiv:1503.08599},
year = {2015}
}
Comments
8 pages, 6 figures, accepted for publication in Physical Review E