Petri J. Käpylä, Maarit J. Mantere, Axel Brandenburg
We report on a simulation of turbulent, rotating, stratified, magnetohydrodynamic convection in spherical wedge geometry. An initially small-scale, random, weak amplitude magnetic field is amplified by several orders of magnitude in the course of the simulation to form coherent large-scale fields in the saturated state of the dynamo. The differential rotation is solar-like (fast equator), but neither coherent meridional circulation nor near-surface shear layer develops in this run. Regions of strong magnetic field propagate towards the poles at high latitudes and towards the equator at low latitudes, reminiscent of the solar cycle.
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http://arxiv.org/abs/1205.4719
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