Direct and inverse cascades in the geodynamo
Fluid Dynamics
2020-01-29 v1
Abstract
The rapid rotation of planets causes cyclonic thermal turbulence in their cores which may generate the large-scale magnetic fields observed outside the planets. We consider the model which enables us reproduce the typical features of small-scale geostrophic flows in physical and wave spaces. We present estimates of kinetic and magnetic energy fluxes as a function of the wave number. The joint existence of forward and inverse cascades are demonstrated. We also consider the mechanism of magnetic field saturation at the end of the kinematic dynamo regime.
Keywords
Cite
@article{arxiv.1005.1546,
title = {Direct and inverse cascades in the geodynamo},
author = {M. Reshetnyak and P. Hejda},
journal= {arXiv preprint arXiv:1005.1546},
year = {2020}
}