Nonlinear convection in an imposed horizontal magnetic field
Abstract
Nonlinear twodimensional magnetoconvection, with a Boussinesq fluid driven across the fieldlines, is taken as a model for giantcell convection in the sun and latetype stars. A series of numerical experiments shows the sensitivity of the horizontal scale of convection to the applied field and to the Rayleigh number R. Overstable oscillations occur in cells as broad as they are deep, but increasing R leads to steady motions of much greater wavelength. Purely geometrical effects can cause oscillation: this work implies that strong horizontal field will in general lead to timedependent convection.
 Publication:

Geophysical and Astrophysical Fluid Dynamics
 Pub Date:
 August 1983
 DOI:
 10.1080/03091928308221752
 Bibcode:
 1983GApFD..25..259A
 Keywords:

 Boussinesq Approximation;
 Convective Flow;
 Late Stars;
 Magnetohydrodynamic Flow;
 Stellar Magnetic Fields;
 Computational Fluid Dynamics;
 Magnetic Flux;
 Oscillating Flow;
 Stellar Models;
 Stellar Oscillations;
 Astrophysics