How far can minimal models explain the solar cycle?
  A physically consistent model of magnetic field generation by convection in a rotating spherical shell with a minimum of parameters is applied to the Sun. Despite its unrealistic features the model exhibits a number of properties resembling those observed on the Sun. The model suggests that the large scale solar dynamo is dominated by a non-axisymmetric $m=1$ component of the magnetic field. 
R. D. Simitev, F. H. Busse
astro-ph.SR physics.flu-dyn