Development of threedimensional turbulent boundary layer in an axially rotating pipe
Abstract
The timemean velocities and turbulent fluctuations inside the turbulent boundary layers which developed in an axially rotating pipe were measured in the case where an undeveloped flow with a rectangular axial velocity distribution was introduced in the pipe. The pipe rotation gives two counter effects on the flow: one is a destabilizing effect due to a large shear caused by the rotating pipe wall and the other is a stabilizing effect due to the centrifugal force of the swirling velocity component of the flow. The destabilizing effect prevails in the inlet region, but the stabilizing effect becomes dominant in the downstream sections. The intensity of turbulence in the rotating pipe decreases ultimately below that in a stationary state of the pipe. Using the experimental results, the relationship between the mixing length and Richardson number proposed by Bradshaw was examined for the turbulent boundary layer that develops in the rotating pipe.
 Publication:

ASME Journal of Fluids Engineering
 Pub Date:
 June 1983
 Bibcode:
 1983ATJFE.105..154K
 Keywords:

 Axial Flow;
 Pipe Flow;
 Rotating Fluids;
 Three Dimensional Boundary Layer;
 Turbulent Boundary Layer;
 Mixing Length Flow Theory;
 Momentum;
 Reynolds Stress;
 Richardson Number;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer