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Experimental investigations of turbulent drag reduction by surface-embedded grooves

Published online by Cambridge University Press:  15 October 2007

B. FROHNAPFEL ,
J. JOVANOVIĆ  and
A. DELGADO
B. FROHNAPFEL
Affiliation:
Institute of Fluid Mechanics, Friedrich-Alexander University of Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
J. JOVANOVIĆ
Affiliation:
Institute of Fluid Mechanics, Friedrich-Alexander University of Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
A. DELGADO
Affiliation:
Institute of Fluid Mechanics, Friedrich-Alexander University of Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
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Abstract

Consideration of near-wall turbulence in the functional space that emphasizes the level of anisotropy of the velocity fluctuations not only provides an understanding of th causative physics behind remarkable effects of turbulent drag reduction, but also lead to the logical design of a surface topology which is shown experimentally to be capable o producing a significant reduction of viscous drag which far exceeds what has been achieved so far.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 590 , 10 November 2007 , pp. 107 - 116
Copyright
Copyright © Cambridge University Press 2007

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References

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