Incompressible laminar axisymmetric near wake behind a very slender cylinder in axial flow.

Abstract : An attempt is made to solve the near wake problem behind a very slender cylinder in axisymmetric incompressible laminar flow by a series expansion method. Although the solution thus found applies only up to a very limited distance downstream of the base, it exhibits important differences with the corresponding two-dimensional problem of the wake behind a flat plate, which are characteristic of the axisymmetry of the flow. This series expansion and an asymptotic expansion for the far wake region are compared with a simple solution obtained by linearizing the momentum equation. (Author)