Self-induced separation of laminar boundary layer and viscid-inviscid interaction over porous surface

Local flow in the boundary layer in the vicinity of a porous surface region has been studied. Mathematical models are formulated and similarity parameters are determined using the asymptotic analysis. Numerical and analytical results that describe the viscid-inviscid interaction of laminar flows near porous surfaces are presented. This method of passive flow control in the boundary layer can be used to eliminate the boundary layer separation and to produce delay of the laminar-turbulent transition. It is shown that the pressure at the point of separation remains virtually unchanged, whereas the pressure gradient grows with increasing coefficient of porosity. This behavior implies that the length of a disturbed flow region decreases when the porosity coefficient increases.