Azimuthally averaged surface density profiles (top) and radial disc eccentricity (bottom) for our Kepler-16 reference setup (using R_min = 0.345 au) with a closed inner boundary condition at t =16 000 T_bin. Coloured solid lines show the results from simulations with different resolutions or different grid-spacing in the R-direction (logarithmic and uniform spacing). The initial density profile is also shown as a dashed black line. All simulations were performed with Pluto.