In this article we discuss the dynamical features of intermittent fluctuations in homogeneous
shear flow turbulence. In this flow the energy cascade is strongly modified by the production
of turbulent kinetic energy related to the presence of vortical structures induced by the shear.
As a consequence, the intermittency of velocity fluctuations increases with respect to
homogeneous and isotropic turbulence. By using direct numerical simulations, we show that
the refined Kolmogorov similarity is broken and a new form of similarity is observed, in …