differential rotation at the stationary state of the magnetic activity evolution, the black line shows the kinematic case. The bottom panel shows [ the maximum amplitude of the zonal velocity perturbation at latitude of 30$^{\circ}$ north on the surface for the models D2, D3, B3 and B4.]{} ](Fig5){width="0.8\columnwidth"}

![Variation of the total flux in D-type models](lt){width="0.8\columnwidth"}

The further quenching of the dynamo process can be seen when we take into account the back reaction of the large-scale magnetic field on the angular momentum transport. It is found that the D- and B-type dynamo models produce the different effect on the angular momentum transport inside the convection zone. In the B-type model the torsional oscillations are concentrated to the bottom of the dynamo domain. Note that the situation can be different for the B-type model with regards for the meridional circulation and the magnetic backreaction on the heat transport (see, @2006ApJ...647..662R).

Figure 4 shows the snapshots of the torsional oscillations and the mean states of the angular velocity distributions for the periods of rotation of 25.3 and 14.5 days for the D2 and B3 models. [ The torsional oscillations are determined as the difference between the instantaneous and the mean profiles 