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AHMED N A
School of Mechanical and Manufacturing
Engineering,
University of New South Wales,
Sydney 2052, Australia
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INVESTIGATION OF DOMINANT
FREQU-ENCIES IN TRANSITION REY-NOLDS NUMBER RANGE OF FLOW
AROUND
A CIRCULAR CYLINDER
PART Ⅱ: THEORETICAL DETERMINATION OF
THE RELATIONSHIP BETWEEN
VORTEX SHED- DING AND TRANSI-
TION FREQUENCIES AT DIFFERENT
REYNOLDS NUMBERS
Abstract:
An attempt has been made to explore whether the power relation can be obtained from theoretical considerations. The classical laminar and turbulent boundary layer concepts have been employed to determine appropriate values of the scaling lengths associated with vortex shedding and shear layer frequencies to predict the power law relationship with Reynolds number. The predicted results are in good agreement with experimental results. The findings will provide a greater insight into the overall phenomenon involved.
Key words:
Vortex shedding Transition Separated flow Shear layer Frequency
Power spectral density
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