Methods for treating a turbulent three-dimensional boundary layer at a plane of symmetry are presented. Reasonable agreement with experiment was achieved by the use of momentum integral techniques in the prediction of momentum thickness, shape factor, wall shear stress, and the location of separation.
Johnston JP. The Turbulent Boundary Layer at a Plane of Symmetry in a Three-Dimensional Flow. ASME. J. Basic Eng. 1960;82(3):622-628. doi:10.1115/1.3662678.