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Resistance of a grooved surface to parallel flow and cross-flow

Published online by Cambridge University Press:  26 April 2006

Paolo Luchini ,
Fernando Manzo  and
Amilcare Pozzi
Paolo Luchini
Affiliation:
Istituto di Gasdinamica, Facoltà di Ingegneria, University of Naples, Italy
Fernando Manzo
Affiliation:
Istituto di Gasdinamica, Facoltà di Ingegneria, University of Naples, Italy
Amilcare Pozzi
Affiliation:
Istituto di Gasdinamica, Facoltà di Ingegneria, University of Naples, Italy
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Abstract

A study is undertaken of both parallel flow and cross-flow in the viscous sublayer generated by a fluid streaming along a grooved surface, with the aim of clarifying the phenomena that underlie the reduction of turbulent drag by such surfaces. A quantitative characterization of the effectiveness of different groove profiles in retarding secondary cross-flow is given in terms of the difference of two ‘protrusion heights’. Analytical calculations of limit cases and a boundary-element computer code for the analysis of general profiles are illustrated, and several examples are presented and discussed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 228 , July 1991 , pp. 87 - 109
Copyright
© 1991 Cambridge University Press

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