Nonlinear simulations of solar rotation effects in supergranules

Details Nonlinear simulations of solar rotation effects in supergranules Nonlinear simulations of solar rotation effects in supergranules

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...77..341h&link_type=abstract

Solar Physics, vol. 77, Apr. 1982, p. 341-356. NSF-supported research.

Physics

24

Convective Flow, Solar Granulation, Solar Rotation, Stellar Models, Coriolis Effect, Flow Distribution, Mathematical Models, Meridional Flow, Particle Trajectories, Reynolds Stress, Three Dimensional Flow, Time Dependence

Scientific paper

Nonlinear calculations are performed for three-dimensional and time dependent convective flow in a plane parallel layer of fluid with parameter values appropriate for supergranules on the sun, in an investigation of flows and global circulations produced by the interaction of rotation with the convective motions. A rotational vector tilted from the vertical is used to represent various latitudes. It is shown that for incompressible fluids, the solar rotation produces turning motions sufficient to completely twist a fluid column in about one day, and the tilted rotation vector produces anisotropies and systematic Reynolds stresses that drive mean flows. The flows produce a rotation rate that increases inward and a meridional circulation with poleward flow along the outer surface. The mean flows should be coupled with those produced by giant cell convection, and the net effect should be an enhancement of poleward flow near the surface with a strong decrease or counter flow near the bottom of the supergranulation layer.

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