On the Hydrodynamics of Accretion Discs  Part One  an Examination of a Standard Boundary Condition
Abstract
The widely used boundary condition on the tangential stress in accretion discs is discussed and found wanting on a number of counts. In particular, it is shown that the value of the viscous energy dissipation calculated from it is unphysical. An alternative boundary condition is suggested. Using this, it is found that the energy balance in the disc places certain restrictions on the rotational velocity in the disc. It seems unlikely that the latter could be of the Keplerian form.
 Publication:

Astrophysics and Space Science
 Pub Date:
 February 1988
 DOI:
 10.1007/BF00639500
 Bibcode:
 1988Ap&SS.141..347K
 Keywords:

 Accretion Disks;
 Boundary Value Problems;
 Hydrodynamic Equations;
 Stellar Rotation;
 Angular Velocity;
 Boundary Conditions;
 Energy Budgets;
 Kepler Laws;
 Astrophysics