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Velocity-derivative skewness in small Reynolds number, nearly isotropic turbulence

Published online by Cambridge University Press:  19 April 2006

S. Tavoularis ,
J. C. Bennett  and
S. Corrsin
S. Tavoularis
Affiliation:
Department of Mechanics and Materials Science, The Johns Hopkins University, Baltimore, Maryland 21218
J. C. Bennett
Affiliation:
United Technologies Research Center, East Hartford, Connecticut 06108
S. Corrsin
Affiliation:
United Technologies Research Center, East Hartford, Connecticut 06108
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Abstract

Previous measurements in the moderate to small Reynolds number range of isotropic turbulence have all shown the skewness factor $S\equiv -{\overline{(\partial u/\partial x)^3}}/[\overline{(\partial u/\partial x)^2}]^{\frac{3}{2}}$ of the streamwise velocity derivative to increase with decreasing Reynolds number. This ‘paradoxical’ trend was found for 150 ≥ Rλ ≥ 4. New data covering the range 4 ≥ Rλ ≥ 1 show a maximum S for Rλ between 4 and 3 and a rapid decrease for Rλ < 2.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 88 , Issue 1 , 13 September 1978 , pp. 63 - 69
Copyright
© 1978 Cambridge University Press

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