Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..90...79u&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 90, no. 1, Feb. 1983, p. 79-107.
Astronomy and Astrophysics
Astronomy
12
Accretion Disks, Astronomical Models, Binary Stars, Hydrodynamic Equations, Stellar Mass Accretion, Turbulent Heat Transfer, Angular Momentum, Black Holes (Astronomy), Convective Flow, Energy Transfer, Flow Geometry, Magnetohydrodynamic Stability, Plasma Density, Plasma Temperature, Radiative Transfer
Scientific paper
A simple method for calculating the structure of an accretion disk is developed which permits the main disk parameters to be calculated more accurately than previously. The basic equations of disk accretion are presented, taking into account the effect of turbulent heat transfer on the disk structure along with the effect of radiative transfer. Turbulent heat transfer is shown to play an important role, and may even be predominant in the inner disk structure. The dependence of the temperature and density on the z-coordinate is found, and the defects of the standard disk theory are discussed. Simple analytic expressions are proposed for the run of the density in all the disk zones. It is shown that the inner disk region is convectively stable, and the main parameters of the zone are derived. The hydrodynamical flows appear directed both toward and outside the central object. A detailed comparison is made with the results of other authors.
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