The velocity distribution in a complex, small radius of curvature, TAD shear flow was shown to follow closely the separation model developed for canonical, two-dimensional, large-Reynolds-number, turbulent boundary layers. The TAD flow produces a very thin shear layer along the inner surface of the initial 90 deg of the turn. Beyond 90 deg, the inner wall shear layer thickens and develops to the start of separation by approximately 150 deg around the turn. The shear layer velocity shape parameters are found to develop through the separation region as predicted by the Sandborn-Kline separation model. The mean velocity distributions in the region of zero-mean surface shear stress separation were shown to agree with equivalent laminar separation profiles.
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