Running time-averaged specific torque obtained with Model 1, for the NIRVANA run (left panel), and the RAMSES run (right panel). For comparison, the final value of the time-averaged torques obtained from 2D laminar disc models are overplotted, wherein the initial density profile is the time-averaged density profile obtained with the MHD run. Note that in the left panel, the turbulent run with NIRVANA is compared to laminar runs carried out with FARGO. Two series of laminar disc models have been performed, one with an inviscid disc (α_p = 0), and one with a viscous disc (corresponding to α_p = 0.03).