Shape and size of the cavity around the binary (with q = 0.5) and the tranferred specific angular momentum j_s as a function of time for models with different viscosity and an aspect ratio h = 0.1. Top two panels show sliding time averages over 10 T_bin, the bottom panel shows 200 T_bin for the two lowest α models, over 100 T_bin for α = 0.01, and over 50 T_bin for α = 0.03 and 0.1. The grey lines indicate the averaging interval for the final quoted equilibrium values. Simulations were performed with the RH2D code.