Time evolution of the angular momentum flux distribution F _J ( l, t) ( l is the specific angular momentum acting as a space-like coordinate) in a disk with constant D _J (see Equation (51)) and different boundary conditions imposed at the inner disk radius r _in, at which the specific angular momentum is l _in: (solid lines) and (dotted lines). The initial distribution of assumes a standard constant disk and is shown by the dashed line. Snapshots of F _J at different times (labeled on the figure) are shown.