Eccentricity and surface density profiles, time-averaged between 35 and 40 binary orbits, obtained with the locally isothermal disk model with imposed temperature profile, using three different boundary conditions at the inner edge: (i) our standard zero-gradient outflow boundary (labeled as open, solid curve), (ii) a viscous outflow boundary (labeled as viscous, dash-dotted curve, see text), and (iii) our standard zero-gradient outflow boundary with the azimuthal velocity at the inner edge extrapolated from that in the first active ring (dashed curve).