To simulate the body in a wind tunnel, the upper boundary will be set to a slip wall, thus avoiding the need to resolve the boundary layer on this wall. The slip wall condition will be applied next to the upper (Slip_wall) boundary. Open the Slip_wall node and then the Physics Conditions node. Select the Shear Stress Specification node.
Set the Method property to Slip.
Viscous effects will be included as part of the analysis using default turbulence settings.
Save the simulation.