Final stationary state of time-dependent disk models with constant and variable viscosity parameter α. We plot the same variables as in the stationary model in Fig. 1. In the constant-viscosity model (dashed line) the viscosity parameter α = α(R_eq), while in the decreasing-viscosity model (solid line) the parameter α = α(R_eq)[ (391 R_eq − R) / (390 R_eq) ] below R = 390 R_eq and α = α(R_eq) / 390 elsewhere. The inner boundary viscosity parameter α(R_eq) = 0.1. We consider the isothermal disk of the main-sequence B2–B3 type star (see Sect. 3). Arrows denote the locations of the critical points.