Anisotropy and SO(3) decomposition in a turbulent boundary layer.

We make use of the SO(3) decomposition to investigate the statistical properties of anisotropic turbulence. We focus in particular on the rate of decay of the anisotropic fluctuations as a function of the scale, and on the existence of universal features of anistropic fluctuations. We discuss two datasets: a nearly homogeneous shear flow and a canonical turbulent boundary layer over a flat plate.