Quantification of anisotropic eddy viscosity in a separated turbulent boundary layer with a spanwise sweep

We study anisotropic effects of a separated boundary layer flow with a spanwise sweep at Re_θ=350. Following the similar canonical settings in the literature, a separation bubble is induced on a fully turbulent boundary layer over a flat plate using a suction and blowing boundary condition. Furthermore, the spanwise sweep is applied at a 35° angle to the chordwise direction to generate a three-dimensional separation effect. We use the macroscopic forcing method (MFM) to quantify the key components in the leading-order anisotropic eddy viscosity. Finally, we compare the eddy viscosity with the no-sweep separated boundary layer to understand the missing pieces in the current turbulence models for separated flows.