Large and small scale motions in kinematic dynamos

Details Large and small scale motions in kinematic dynamos Large and small scale motions in kinematic dynamos

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gapfd..32..135w&link_type=abstract

Geophysical and Astrophysical Fluid Dynamics (ISSN 0309-1929), vol. 32, May 1985, p. 135-161.

Physics

Fluid Dynamics

4

Atmospheric Models, Convection Currents, Dynamo Theory, Meridional Flow, Solar Magnetic Field, Turbulent Flow, Kinematics, Magnetic Field Configurations, Shear Flow, Solar Atmosphere

Scientific paper

The cooperation between small-scale turbulent motion and large-scale motions in kinematic axisymmetric mean-field dynamo models with meridional circulation is investigated theoretically. The basic equations and solution method are set forth, and results for spherical and spherical-shell models are presented graphically and discussed. The enhancement or inhibition of the dynamo action by meridional flow is shown to depend on the location of toroidal shearing, with a double-cell flow structure in shells favoring an oscillatory dynamo of dipole type.

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