  Recent ALMA observations have resolved the obscuring torus in the nearest Sy2
galaxy, NGC1068, in the millimeter band. These observations have confirmed the
presence of a geometrically thick torus with an orbital motion of its matter
and the velocity distribution which can reflect the clumpy structure. In the
framework of N-body simulations we consider a dynamical model of an obscuring
torus which accounts for the gravitational interaction between the clouds
moving in the field of the central mass. In considered model, clouds are
orbiting around the central mass exhibiting a spread in inclination and
eccentricity. The self-gravity of the torus induces the velocity distribution
of clouds with a global orbital motion which mimics the ALMA data for NGC1068.
