Turbulent 3D MHD dynamo model in spherical shells: Regular oscillations of the dipolar field

Details Turbulent 3D MHD dynamo model in spherical shells: Regular oscillations of the dipolar field Turbulent 3D MHD dynamo model in spherical shells: Regular oscillations of the dipolar field

2011-02-05

arxiv.org/abs/1102.1092v1

Procs 2010 CTR Summer Program, P. Moin (ed.), pp. 475-484, Stanford University, 2010

Physics

Fluid Dynamics

http://www.stanford.edu/group/ctr/Summer/SP10/index.html

Scientific paper

We report the results of three-dimensional numerical simulations of convection-driven dynamos in relatively thin rotating spherical shells that show a transition from an strong non-oscillatory dipolar magnetic field to a weaker regularly oscillating dipolar field. The transition is induced primarily by the effects a stress-free boundary condition. The variation of the inner to outer radius ratio is found to have a less important effect.

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