Wall region of a relaxing three-dimensional incompressible turbulent boundary layer

Hebbar, KS and Melnik, WL (1978) Wall region of a relaxing three-dimensional incompressible turbulent boundary layer. Journal of Fluid Mechanics, 85 . pp. 33-56. ISSN 0022-1120

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Abstract

An experimental investigation was conducted at selected locations in the wall region of a three-dimensional turbulent boundary layer relaxing in a nominally zero external pressure gradient behind a transverse hump faired into the side wall of a low-speed wind tunnel. The existence of wall similarity in the relaxing flow field was confirmed in the form of a log law based on the resultant mean velocity and resultant friction velocity. The streamwise relaxation of the mean flow field based on the decay of the crossflow angle was much faster in the inner layer than in the outer layer. Over the streamwise distance covered, the mean flow in the inner layer and the wall shear-stress vector relaxed to a two-dimensional state in approximately 10 boundary-layer thicknesses whereas the relaxation of the turbulence was slower and was not complete over the same distance

Item Type: Journal Article
Uncontrolled Keywords: Boundary layer turbulence
Subjects: AERONAUTICS > Aerodynamics
Division/Department: Aerodynamics, Aerodynamics
Depositing User: Ms Indrani V
Date Deposited: 15 May 2007
Last Modified: 24 May 2010 09:55
URI: http://nal-ir.nal.res.in/id/eprint/4194

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