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Boundary Shear Stress in Turbulent Boundary Layers on Smooth Boundaries

Published online by Cambridge University Press:  04 July 2016

Dr. N. Rajaratnam  and
C. R. Froelich
Dr. N. Rajaratnam
Affiliation:
Dept of Civil Engineering, University of Alberta, Canada
C. R. Froelich
Affiliation:
Dept of Civil Engineering, University of Alberta, Canada
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Extract

It is well known that in the case of turbulent flow over smooth boundaries, the velocity distribution in the neigh- i bourhood of the wall is given by the law of the wall, c written as

where u is the turbulent mean velocity at a normal distance of y from the boundary, u* is the shear velocity equal to being the boundary shear stress and ρ the mass density of the fluid and v is the coefficient of kinematic viscosity. In the viscous sublayer, eqn. (1) becomes

and in the turbulent flow region above the sublayer and the transition region, for yu*/v> 30, eqn. (1) becomes

where A and B are coefficients.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 71 , Issue 673 , January 1967 , pp. 52 - 53
Copyright
Copyright © Royal Aeronautical Society 1967

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References

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