Kinematic dynamo induced by helical waves
Fluid Dynamics
2015-06-03 v1 Earth and Planetary Astrophysics
Solar and Stellar Astrophysics
Geophysics
Abstract
We investigate numerically the kinematic dynamo induced by the superposition of two helical waves in a periodic box as a simplified model to understand the dynamo action in astronomical bodies. The effects of magnetic Reynolds number, wavenumber and wave frequency on the dynamo action are studied. It is found that this helical-wave dynamo is a slow dynamo. There exists an optimal wavenumber for the dynamo growth rate. A lower wave frequency facilitates the dynamo action and the oscillations of magnetic energy emerge at some particular wave frequencies.
Keywords
Cite
@article{arxiv.1407.6633,
title = {Kinematic dynamo induced by helical waves},
author = {Xing Wei},
journal= {arXiv preprint arXiv:1407.6633},
year = {2015}
}