Astronomy and Astrophysics 336, 791-801
Date of entry: March 3, 1998.
A high Reynolds number algorithm for polytropic accretion disk studies
Michiel D. Nauta and Gábor Tóth
Sterrenkundig Instituut, Utrecht, The Netherlands
An algorithm is proposed to study two-dimensional vortices in
thin, polytropic accretion disks.
It is based on a method which has been used to study vortices in
It is special in that it conserves both energy and potential
enstrophy in the absence of dissipation.
This leads to desirable stability properties which permit calculations
at relatively high Reynolds numbers.
The algorithm is tested and compared to existing methods, in particular
with a Total Variation Diminishing method.