Journal of Fluid Mechanics

Papers

Experimental investigations of turbulent drag reduction by surface-embedded grooves

B. FROHNAPFELa1, J. JOVANOVIĆa1 and A. DELGADOa1

a1 Institute of Fluid Mechanics, Friedrich-Alexander University of Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany

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.

(Received April 24 2007)

(Revised August 06 2007)

Metrics
Related Content