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The generation of symmetrical duct velocity profiles of high uniform shear

Published online by Cambridge University Press:  28 March 2006

J. L. Livesey  and
J. T. Turner
J. L. Livesey
Affiliation:
Engineering Department, University of Manchester
J. T. Turner
Affiliation:
Rolls Royce Ltd.
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Abstract

The logical design method of Owen & Zienkiewicz (1957), for the generation of linear shear flow, is successfully applied to the case of symmetrical velocity profiles in a two-dimensional duct. Shear parameters as high as 0·8 (corresponding to $\hat{V}| \overline {V} = 1\cdot4$) are obtained experimentally. Some slight modification to the theoretical grid spacing is required because of the non-uniformity of the upstream flow.

The decay of the profiles is confined to that due to the developing boundary layer and to the breakdown of the physically impossible condition at the centre, where symmetry implies a change in sign of the uniform shear.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 20 , Issue 2 , October 1964 , pp. 201 - 208
Copyright
© 1964 Cambridge University Press

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References

Elder, J. W. 1959 J. Fluid Mech. 5, 355–368.
Livesey, J. L., Parker, E. & Jones, P. K. 1956 J. Roy. Aero. Soc. 61, 415–417.
Owen, P. R. & Zienkiewicz, H. K. 1957 J. Fluid Mech. 2, 521–531.