Navier-Stokes Solutions for Laminar Incompressible Boundary Layers with Strong Viscous-Inviscid Interaction

摘要

In the present report a numerical method is described for the calculation of laminar incompressible boundary-layer flows with strong viscous-inviscid interaction. In this method the usually prescribed pressure distribution has been replaced by an interactive boundary condition which models the behaviour of the outer flow past a curved wall with boundary layer. This approach enables simultaneous solution of boundary-layer and outer flow, avoiding the difficulties associated with either direct or inverse methods. In this way a fast convergence has been obtained without encountering numerical instabilities in separation points. The interactive boundary condition is consistent with the description by asymptotic triple-deck equations of the flow near a singular point.