Planetary dynamos: from equipartition to asymptopia

Details Planetary dynamos: from equipartition to asymptopia Planetary dynamos: from equipartition to asymptopia

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..259..259r&link_type=abstract

Cosmic Magnetic Fields: From Planets, to Stars and Galaxies, Proceedings of the International Astronomical Union, IAU Symposium,

Astronomy and Astrophysics

Astronomy

Convection, Turbulence, Magnetic Fields, Instabilities

Scientific paper

This review focuses on three topics relevant to naturally-occurring dynamos. The first considers how a common belief, that states of equipartition of magnetic and kinetic energy are preferred in nonrotating systems, is modified when Coriolis forces are influential, as in the Earth's core. The second reviews current difficulties faced by planetary and stellar dynamo theories, particularly in representing the sub-grid scales. The third discusses recent attempts to extract scaling laws from numerical integrations of the Boussinesq dynamo equations.

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