Statistics – Computation
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257..572g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 4, Aug. 15, 1992, p. 572-580.
Statistics
Computation
11
Accretion Disks, Boundary Layer Equations, Hydrodynamic Equations, Rotating Matter, Black Body Radiation, Computational Astrophysics, Viscous Flow
Scientific paper
A theoretical study of the properties of the inner boundary layer in an accretion disk is presented. The requirement of causality is shown to exclude a wide range of solutions, some of which are extensively discussed in recent investigations, and to allow for a considerable simplification of the relevant equations. The traditional estimate of the boundary layer thickness, relying on the implicit assumption of non-axisymmetry, is found to be wrong, and a correct estimate involving the meridional velocity components is derived. It is proven that spatial variability of viscosity is a necessary condition for the existence of a narrow boundary layer, are constructed and their properties are discussed.
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