On the genesis of the Earth's magnetism

PH Roberts, EM King - Reports on Progress in Physics, 2013 - iopscience.iop.org
Few areas of geophysics are today progressing as rapidly as basic geomagnetism, which
seeks to understand the origin of the Earth's magnetism. Data about the present …

Dynamo theories

F Rincon - Journal of Plasma Physics, 2019 - cambridge.org
These lecture notes are based on a tutorial given in 2017 at a plasma physics winter school
in Les Houches. Their aim is to provide a self-contained graduate-student level introduction …

Magnetohydrodynamic experiments on cosmic magnetic fields

F Stefani, A Gailitis, G Gerbeth - ZAMM‐Journal of Applied …, 2008 - Wiley Online Library
It is widely known that cosmic magnetic fields, ie the fields of planets, stars, and galaxies, are
produced by the hydromagnetic dynamo effect in moving electrically conducting fluids. It is …

The von Kármán sodium experiment: turbulent dynamical dynamos

R Monchaux, M Berhanu, S Aumaître, A Chiffaudel… - Physics of …, 2009 - pubs.aip.org
The von Kármán Sodium (VKS) experiment studies dynamo action in the flow generated
inside a cylinder filled with liquid sodium by the rotation of coaxial impellers (the von Kármán …

Finite differences for coarse azimuthal discretization and for reduction of effective resolution near origin of cylindrical flow equations

C Bogey, N De Cacqueray, C Bailly - Journal of Computational Physics, 2011 - Elsevier
In this paper, the errors generated by the computation of derivatives in the azimuthal
direction θ when flow equations are solved in cylindrical coordinates using finite differences …

Exact two-dimensionalization of low-magnetic-Reynolds-number flows subject to a strong magnetic field

B Gallet, CR Doering - Journal of Fluid Mechanics, 2015 - cambridge.org
We investigate the behaviour of flows, including turbulent flows, driven by a horizontal body
force and subject to a vertical magnetic field, with the following question in mind: for a very …

Chaotic dynamics of the magnetic field generated by dynamo action in a turbulent flow

F Pétrélis, S Fauve - Journal of Physics: Condensed Matter, 2008 - iopscience.iop.org
We present models related to the results of a recent experiment (the'VKS experiment')
showing the generation of a magnetic field by a fully turbulent flow of liquid sodium. We first …

A spherical shell numerical dynamo benchmark with pseudo-vacuum magnetic boundary conditions

A Jackson, A Sheyko, P Marti, A Tilgner… - Geophysical Journal …, 2014 - academic.oup.com
It is frequently considered that many planetary magnetic fields originate as a result of
convection within planetary cores. Buoyancy forces responsible for driving the convection …

Role of Soft-Iron Impellers on the Mode Selection<? format?> in the von Kármán–Sodium Dynamo Experiment

A Giesecke, F Stefani, G Gerbeth - Physical review letters, 2010 - APS
A crucial point for the understanding of the von Kármán–sodium (VKS) dynamo experiment
is the influence of soft-iron impellers. We present numerical simulations of a VKS-like …

Numerical simulations of dynamos generated in spherical Couette flows

C Guervilly, P Cardin - Geophysical and Astrophysical Fluid …, 2010 - Taylor & Francis
We numerically investigate the efficiency of a spherical Couette flow at generating a self-
sustained magnetic field. No dynamo action occurs for axisymmetric flow, while we always …