The helicity constraint in spherical shell dynamos

Abstract

The motivation for considering distributed large scale dynamos in the solar context is reviewed in connection with the magnetic helicity constraint. Preliminary accounts of 3-dimensional direct numerical simulations (in spherical shell segments) and simulations of 2-dimensional mean field models (in spherical shells) are presented. Interesting similarities as well as some differences are noted.

4 pages, 5 fig, proceedings of 5th Potsdam Thinkshop on Meridional flow, differential rotation, solar and stellar activity, to be published in Astron. Nachr