Kinematic dynamos with precession driven flow in a sphere

Details Kinematic dynamos with precession driven flow in a sphere Kinematic dynamos with precession driven flow in a sphere

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007gapfd.101....1t&link_type=abstract

Geophysical and Astrophysical Fluid Dynamics, vol. 100, Issue 1, p.1-9

Physics

Fluid Dynamics

14

Precession, Dynamo Effect

Scientific paper

Precession driven flow is investigated numerically in a spherical shell with an inner core of negligible size and at various angles between the axes of precession and rotation of the shell. For each angle and at an Ekman number of 5 ×10-4, there are always two values of retrograde precession at which the flow is particularly unstable. Dynamo action occurs in both cases. The generated magnetic fields have a relatively small dipole component and significant contributions from high multipoles.

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