Experiment on the turbulent boundary layer over convex walls and its recovery to flatwall conditions
Abstract
The experiments were performed at a ratio of the thickness at which velocity is 99% of the potential flow velocity to the surface radius of curvature of about 0.09 on a convex wall, where the curvature effects are strong. The data show that a flatwall boundary layer is strongly affected by curvature only a few boundary layer thicknesses downstream of the start of convex curvature. On the other hand, in flow over a flat surface downstream of convex curvature, the effects of curvature persist downstream for ten or more boundary layer thicknesses. It appears that the boundary layer over a convex wall may have a multilayer character which is slow to return to normal, flatplate equilibrium.
 Publication:

2nd Symposium on Turbulent Shear Flows
 Pub Date:
 1979
 Bibcode:
 1979stsf.proc....6G
 Keywords:

 Boundary Layer Flow;
 Flow Geometry;
 Turbulent Boundary Layer;
 Two Dimensional Flow;
 Wall Flow;
 Convexity;
 Flat Surfaces;
 Shear Stress;
 Skin Friction;
 Velocity Distribution;
 Wind Tunnels;
 Fluid Mechanics and Heat Transfer