Convective dynamos in spherical wedge geometry
P. J. K\"apyl\"a (1,2), M. J. Korpi (1), A. Brandenburg (2,3), D., Mitra (4), R. Tavakol (4) ((1) University of Helsinki, (2) NORDITA, (3), University of Stockholm, (4) Queen Mary College)
TL;DR
This paper presents convective dynamo simulations in wedge-shaped spherical shells, revealing how rapid rotation influences differential rotation, magnetic field migration, and compares these results with previous models.
Contribution
It introduces self-consistent convective dynamo simulations in wedge geometries, highlighting the effects of rotation rate on dynamo behavior and large-scale magnetic field migration.
Findings
Differential rotation is generated by convection-rotation interaction.
Equatorward acceleration occurs only at high rotation rates.
Large-scale magnetic fields migrate poleward.
Abstract
Self-consistent convective dynamo simulations in wedge-shaped spherical shells are presented. Differential rotation is generated by the interaction of convection with rotation. Equatorward acceleration and dynamo action are obtained only for sufficiently rapid rotation. The angular velocity tends to be constant along cylinders. Oscillatory large-scale fields are found to migrate in the poleward direction. Comparison with earlier simulations in full spherical shells and Cartesian domains is made.
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