Plane Turbulent Wall Wakes

by Nallamuthu Rajaratnam, (M.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, Canada,
Sri P. Rai, Lect.; Dept. of Civ. Engrg., Univ. of Singapore, Singapore, Malaysia; formerly, Grad. Research Asst., Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, Canada,

Serial Information: Journal of the Engineering Mechanics Division, 1979, Vol. 105, Issue 5, Pg. 779-794

Document Type: Journal Paper


This paper presents a two-layer model to describe the velocity profiles in the far-wake region of plane turbulent wall wakes. In the outer region, the velocity profiles are described by the (simple) wake equation whereas in the inner (wall) region, the law of the wall applies. Using the similarity property of the velocity profiles, the integral momentum equation, and the experimental results generated from a wind-tunnel study, equations have been developed to predict the velocity and length scales. The wall shear stress was found to be approximately constant in a large part of the far-wake region.

Subject Headings: Velocity profile | Walls | Shear walls | Shear stress | Turbulent flow | Integrals | Integral equations | Wind tunnel

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