Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...114...77k&link_type=abstract
Astronomy and Astrophysics, vol. 114, no. 1, Oct. 1982, p. 77-84.
Astronomy and Astrophysics
Astrophysics
24
Accretion Disks, Hydrostatic Pressure, Meridional Flow, Radiative Transfer, Thermodynamic Equilibrium, Baroclinic Instability, Circulation Distribution, Equilibrium Equations, Kepler Laws, Turbulent Flow, Viscous Flow
Scientific paper
It is shown that in thin Keplerian disks similar to rotating stars both equilibria cannot be maintained simultaneously. For small values alpha less than H/s of the viscosity parameter, alpha (H half-thickness of the disk, s distance from the axis of rotation) the disk is near hydrostatic equilibrium and thermally driven circulation has to fulfill energy conservation. For values of alpha with H/s less than alpha less than 1 the disk is near thermal equilibrium but hydrostatic equilibrium is not fulfilled in horizontal direction. Therefore dynamically driven circulation occurs. In both cases the circulation is strongly diminished after it has produced a slight baroclinicity. Some of the consequences are discussed.
Kippenhahn Rudolf
Thomas Hans-Christoph
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