Advancing Detached-Eddy Simulation

Abstract : Measurements show that the flow over the Aerospatiale A-airfoil experiences a laminar separation in the vicinity of the leading edge region, just downstream of the peak negative pressure along the suction side. Transition occurs in the separated shear layer with the reattached turbulent boundary layer evolving further along the suction side prior to a subsequent separation near the trailing edge. The laminar separation and transition is accounted for using the tripless approach outlined by Travin (57). The tripless approach provides a means to accommodate the laminar separation and transition in the separated shear layer, in the present calculations represented by an activation of the turbulence model. The eddy viscosity upstream of the airfoil is zero, non-zero values are seeded into the suction side of the airfoil using a boundary layer trip.