Numerical simulations of gas-dynamical processes taking place in the accret
ion disk of a stellar binary system are presented. The initial state of the
disk is an equilibrium gaseous configuration. Mechanisms for the developme
nt of spiral waves and associated variations in the angular momentum of the
gas are considered. The influence of the ratio of the binary-component mas
ses and the initial disk configuration are investigated. It is concluded th
at the existence of a steady-state disk is impossible without a flow of gas
from the donor star. (C) 2001 MAIK "Nauka/Interperiodica".