The asymptotic structure of laminar flow with finite regions of separation

The asymptotic structure (Re tends to infinity) of laminar separating flow is investigated for the two limits of large and small oncoming boundary layer thickness. In the first case, the recirculating region lies within the lower part of the boundary layer, and the asymptotic description is straightforward using triple deck theory. In the second case, the boundary layer separates as a whole bounding an asymptotically large recirculating region. The starting point of an asymptotic description is the 'relevant Euler solution' which must be extended by the effects of finite Re number.