Investigations of the wall-shearing stress in turbulent boundary layers

Ludwieg, Hubert., Tillmann, W.

Because of the unsatisfactory state of knowledge concerning the surface shearing stress of boundary layers with pressure gradients, the problem is re-examined. It is found that for general turbulent boundary layers in wall proximity, that is, in the laminar sublayer, in the transition zone and in the part of the completely turbulent zone near the wall, the same universal law applies as for the plate flow.

An Adobe Acrobat (PDF) file of the entire report: