Mathematics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984sses.nasa..315g&link_type=abstract
In JPL Solar Seismology from Space. p 315-324 (SEE N85-25060 14-92)
Mathematics
Convection, Gravity Waves, Magnetohydrodynamics, Mathematical Models, Solar Magnetic Field, Wave Excitation, Coriolis Effect, Nonlinear Equations, Phase Velocity, Stratified Flow, Three Dimensional Models, Time Dependence
Scientific paper
Magneto-convection and gravity waves are numerically simulated with a nonlinear, three-dimensional, time-dependent model of a stratified, rotating, spherical fluid shell heated from below. A Solar-like reference state is specified while global velocity, magnetic field, and thermodynamic perturbations are computed from the anelastic magnetohydrodynamic equations. Convective overshooting from the upper (superadiabatic) part of the shell excites gravity waves in the lower (subadiabatic) part. Due to differential rotation and Coriolis forces, convective cell patterns propagate eastward with a latitudinally dependent phase velocity. The structure of the excited wave motions in the stable region is more time-dependent than of the convective motions above. The magnetic field tends to be concentrated over giant-cell downdrafts in the convective zone but is affected very little by the wave motion in the stable region.
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