Separation of jets or thermal boundary layers from a wall
Abstract
The paper gives an analysis of the structure of a jet flow near its point of separation from a wall. It is supposed that a viscous jet flow has been set up in a boundary layer of thickness of the order of L divided by the square root of the Reynolds number, where L is a typical length scale. For a twodimensional, incompressible fluid in the Boussinesq approximation it is shown that the jet flow can develop a free interaction over a streamwise length scale of the order of L divided by Re to the 3/7 power centered about the point of separation. The interaction has a doubledeck structure in which the unknown induced pressure and displacement are linked by a relation peculiar to the jet flow situation. Separation is most likely to take place, within the double deck, at a distance of the order of L divided by Re to the 3/14 power.
 Publication:

Quarterly Journal of Mechanics and Applied Mathematics
 Pub Date:
 May 1977
 Bibcode:
 1977QJMAM..30..143S
 Keywords:

 Boundary Layer Separation;
 Thermal Boundary Layer;
 Viscous Flow;
 Wall Jets;
 Corner Flow;
 Flow Equations;
 Inviscid Flow;
 Reattached Flow;
 Reversed Flow;
 Shear Layers;
 Fluid Mechanics and Heat Transfer