Energy pathways in large- and small-scale convection-driven dynamos
Fluid Dynamics
2022-12-20 v2 Earth and Planetary Astrophysics
Solar and Stellar Astrophysics
Geophysics
Plasma Physics
Abstract
We investigate the energy pathways between the velocity and the magnetic fields in a rotating plane layer dynamo driven by Rayleigh-B\'enard convection using direct numerical simulations. The kinetic and magnetic energies are divided into mean and turbulent components to study the production, transport, and dissipation associated with large and small-scale dynamos. This energy balance-based characterization reveals distinct mechanisms for large- and small-scale magnetic field generation in dynamos, depending on the nature of the velocity field and the conditions imposed at the boundaries.
Cite
@article{arxiv.2212.00969,
title = {Energy pathways in large- and small-scale convection-driven dynamos},
author = {Souvik Naskar and Anikesh Pal},
journal= {arXiv preprint arXiv:2212.00969},
year = {2022}
}