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RESEARCH PAPERS

Intermittent Phenomena in the Flow Over a Rib Roughened Surface

[+] Author and Article Information
T. Mullin

The Clarendon Laboratory, Oxford, United Kingdom

S. R. Martin

AEA Technology, Harwell Laboratory, Oxfordshire, United Kingdom

J. Fluids Eng 113(2), 206-209 (Jun 01, 1991) (4 pages) doi:10.1115/1.2909481 History: Received January 19, 1990; Online May 23, 2008

Abstract

Laser Doppler anemometry has been used to make measurements of a small recirculation bubble in a turbulent water flow over a rib roughened surface. The bubble occurs near the leading edge of a transverse rib which is a model of the ribbed surface used to enhance cooling on nuclear reactor fuel pins. The bubble is transient, and spectral and correlation measurements were made to investigate any periodicity. It was found that the bubble itself did not show any periodicity but there was evidence for fluctuations in the main stream with a Strouhal number of 0.1.

Copyright © 1991 by The American Society of Mechanical Engineers
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