Home > Legacy archive > User’s manual > Parameters > ImposedDiskDrift

This parameter, which defaults to zero, corresponds to an axisymmetric extra torque added everywhere to the disk material so as to induce a global radial drift of the latter, in addition to the viscous drift. This was implemented for the “in the place migration” technique developed by Masset & Papaloizou (2003), section 5.6 (see in particular Eq. 34). The value of ImposedDiskDrift corresponds to the radial velocity imposed at r=1 (this radial velocity depends on radius so that the drift is steady state, {i.e.} so that \Sigma r v_d is independent of r, where v_d is the radial drift velocity induced by this extra torque).

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