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An experimental investigation of flow in an oscillating pipe

Published online by Cambridge University Press:  12 April 2006

M. Clamen  and
P. Minton
M. Clamen
Affiliation:
Department of Civil Engineering, Imperial College, London Present address: International Joint Commission, Ottawa, Canada.
P. Minton
Affiliation:
Department of Civil Engineering, Imperial College, London
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Abstract

The hydrogen-bubble technique has been used to measure the velocities of pulsating water flow in a rigid circular pipe. Mean flows with Reynolds numbers between 1275 and 2900 were superimposed on an oscillating flow produced by moving the pipe axially with simple harmonic motion. While the velocities in the oscillating boundary layers on the pipe wall were found to be close to those predicted by laminar flow theory, at the higher Reynolds numbers the velocities near the centre of the pipe were lower than those predicted and more uniformly distributed.

The intermittency of the periodic bursts of turbulent motion at the higher Reynolds numbers was measured. At each mean-flow Reynolds number the turbulent intermittency of the flow was found to be a function of a single parameter: the harmonicflow Reynolds number.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 81 , Issue 3 , 13 July 1977 , pp. 421 - 431
Copyright
© 1977 Cambridge University Press

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References

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