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The Determination of the Position of Maximum Velocity in Turbulent Shear Flow

Published online by Cambridge University Press:  04 July 2016

F. Durst ,
B. E. Launder  and
H. Åkesson
F. Durst
Affiliation:
Department of Mechanical Engineering, Imperial College, London
B. E. Launder
Affiliation:
Department of Mechanical Engineering, Imperial College, London
H. Åkesson
Affiliation:
Aktiebolaget Atomenergi Studsvik, Sweden
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Extract

The majority of current prediction procedures for turbulent flows employ models of turbulent momentum transfer which calculate an effective viscosity for μeff such that for a boundary-layer flow the shear stress, τ, is given by:

A number of recent experimental investigations (ref. 1-3 for example) have found, however, that in strongly asymmetric turbulent flows, τ is finite where the mean velocity gradient is zero—and vice versa. These phenomena, which are evidently not describable in terms of an effective viscosity hypothesis, point the need for a more complete description of turbulent motion.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 75 , Issue 723 , March 1971 , pp. 196 - 199
Copyright
Copyright © Royal Aeronautical Society 1971 

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References

1. Hanjalic, K. and Launder, B. E. Fully-developed flow in rectangular ducts of non-uniform surface texture. Imperial College Mech Eng Dept Rep TWF/TN/48.Google Scholar
2. Tailand, A. and Mathieu, J. Jour de Mecanique, Vol 6. 1967.Google Scholar
3. Kjellström, B. and Hedberg, S. On shear stress distributions for flow in partially rough annuli. Aktiebolaget Atomenergi report AE-243, 1966.Google Scholar
4. Ouarmby, A. An experiment study of turbulent flow through concentric annuli. Int Jour Mech Eng Sci, Vol 9, pp 205–221, 1967.Google Scholar
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6. Durst, F. On turbulent flow through annular passages with smooth and rough cores. Part II. MSc Thesis, Mech Eng Dept, Imperial College, 1968.Google Scholar