  We study the P-odd effects related to the vorticity of the medium formed in
noncentral heavy ion collisions. Using the kinetic Quark-Gluon Strings Model we
perform the numerical simulations of the vorticity and hydrodynamical helicity
for the various atomic numbers, energies and centralities. We observed the
vortical structures typically occupying the relatively small fraction of the
fireball volume. In the course of numerical simulations the noticeable
hydrodanamical helicity was observed manifesting the specific mirror behaviour
with respect to the reaction plane. The effect is maximal at the NICA and FAIR
energy range.
