Spatial variation of angular momentum transport in turbulent spherical Couette flow.

Turbulent shear flow between two concentric rotating spheres of radius ratio $\eta=0.35$ is studied up to 56 million Reynolds number. The dimensionless differential rotation as expressed by the Rossby number $Ro=(\Omega_i-\Omega_o)/\Omega_o$ is an important parameter in setting the observed large scale flow state and the angular momentum flux through the system at a given Reynolds number $Re=(\Omega_i-\Omega_o)L^2/\nu$. Here we consider the case where the inner sphere super-rotates in the range $0