Threedimensional turbulent boundary layer: Restructuration of an axisymetric flow subjected to a discontinuity of the wall peripheral velocity
Abstract
The influence of the rotation of a cylinder on the restructuration of a developing three dimensional boundary layer is studied by using the analysis of the mean velocity field. A three dimensional turbulent boundary layer is developed on a circular cylinder the axis of which is parallel to the flow. In the downstream region the boundary layer is fully developed and the rear part of the cylinder rotates about its axis. The peripheral velocity at the wall is practically equal to the external velocity. The model used can account for the inequality of the turbulent shear stress direction and the velocity gradient direction. Emphasis is placed on the study of the buffer layer down to the viscous sublayer. The measurements reveal that the collaterality of the flow is first obtained in a very thin region near the wall and then seems to extend progressively in the boundary layer. In contrast, the calculations indicate a more extended linear portion of the hodograph.
 Publication:

In AGARD Turbulent Boundary Layers 11 p (SEE N8027647 1834
 Pub Date:
 January 1980
 Bibcode:
 1980tbl..agarR....A
 Keywords:

 Axisymmetric Flow;
 Reconstruction;
 Three Dimensional Boundary Layer;
 Turbulent Boundary Layer;
 Boundary Layer Equations;
 Circular Cylinders;
 Hodographs;
 Rotating Cylinders;
 Shear Stress;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer