SEPARATING BOUNDARY-LAYER FLOW CALCULATIONS

The Box scheme has been used along with the Reyhner and Flugge-Lotz approximation and a nonlinear eigenvalue approach to inverse boundary-layer flows to compute flows with separation and reattachment. The approximate reverse flow region is corrected by a downstream-upstream iteration procedure similar to that introduced by Klemp and Acrivos, but implemented quite differently, and it converges extremely fast. A careful look at the convergence properties and the occurence of very small oscillations suggests several smoothing procedures which can be used for very severe cases of reverse flow. © 1979.