Velocity anisotropy as a function of radius, , for all the hydro models. Negative/positive values imply a tangential/radial bias. g-waves (M ≤ 0.25) tend to damp the radial component of turbulent motions, inducing a tangential bias; p-waves (M ≥ 0.75) tend instead to preserve isotropic motions, or to induce a slightly radial bias. In realistic clusters, the anisotropy is expected to be minor, due to the interplay of both waves and the recurrent stirring.