Laminarization of Turbulent Flow in the Inlet Region of an Axially Rotating Pipe : Fluids Engineering

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This paper describes the laminarization phenomenon of the flow in an axially rotating pipe when a fully developed turbulent flow is introduced into it. The rotating boundary layer is initially strongly stabilized by the centrifugal force due to the rotating velocity component, resulting in a laminarization of flow. This flow laminarization has been found to be more remarkable in the inlet region where a non-rotating inner core exists in the pipe section. The laminarized flow tends to be unstable as the flow goes downstream, and bursts of turbulence appear, which was also confirmed by the use of a flow visualization technique.
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