Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-27T15:15:19.706Z Has data issue: false hasContentIssue false

A turbulent mixing layer constrained by a solid surface. Part 2. Measurements in the wall-bounded flow

Published online by Cambridge University Press:  20 April 2006

D. H. Wood
Affiliation:
Department of Aeronautics, Imperial College, London Present address: Department of Mechanical Engineering, University of Newcastle, N.S.W. 2308, Australia.
P. Bradshaw
Affiliation:
Department of Aeronautics, Imperial College, London

Abstract

The single- and two-point measurements made in a high-Reynolds-number single-stream mixing layer growing to encounter a wind-tunnel floor on its high-velocity side that were described by Wood & Bradshaw (1982) have been extended to the wall-bounded flow. It is shown that the expected large amplification of the normal-stress components in the plane of the wall does not occur until after the mixing layer reaches the surface. There is some evidence that the double-roller component of the large-eddy structure of the original free shear layer is being re-established in the wall-bounded flow after having been stretched and weakened by the initial effect of the wall. The triple-product terms appearing in the turbulent-energy and shear-stress equations are altered in a way that cannot be reproduced by models used in current calculation methods. It appears that all the pressure-fluctuation terms in the individual normal-stress and shear-stress transport equations respond in a non-monotonic manner to the imposition of the wall. The implications for calculation methods suitable for predicting the change from an initially unaffected free shear layer to a wall-bounded flow are discussed.

Type
Research Article
Copyright
© 1984 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Andreopoulos, J. & Wood, D. H. 1982 J. Fluid Mech. 118, 143.
Bradshaw, P. 1967 J. Fluid Mech. 30, 241.
Bradshaw, P. 1975 Trans. ASME I: J. Fluids Engng 97, 146.
Bradshaw, P. 1976 In Proc. 14th Intl Congr. Appl. Mech. (ed. W. T. Koiter), p. 101. North-Holland.
Cormack, D. E., Leal, L. G. & Seinfeld, J. H. 1978 Trans. ASME I: J. Fluids Engng 100, p. 47.
Gibson, M. M. & Launder, B. E. 1978 J. Fluid Mech. 86, 441.
Grant, H. L. 1958 J. Fluid Mech. 4, 149.
Hunt, J. C. R. & Graham, J. M. R. 1978 J. Fluid Mech. 84, 209.
Kline, S. J., Cantwell, B. J. & Lilley, G. M. (eds.) 1982 Proc. 1981 Stanford Conf. on Complex Turbulent Flows, vol. II.
Launder, B. E., Reece, G. J. & Rodi, W. 1975 J. Fluid Mech. 68, 537.
Smits, A. J., Young, S. T. B. & Bradshaw, P. 1979 J. Fluid Mech. 94, 209.
Thomas, N. H. & Hancock, P. E. 1978 J. Fluid Mech. 82, 481.
Townsend, A. A. 1961 J. Fluid Mech. 11, 97.
Wills, J. A. B. 1964 J. Fluid Mech. 20, 417.
Wood, D. H. 1980 A reattaching, turbulent thin shear layer. Ph.D. thesis, Imperial College, London.
Wood, D. H. & Bradshaw, P. 1982 J. Fluid Mech. 122, 57.
Wood, D. H. & Ferziger, J. H. 1983 The potential flow bounded by a mixing layer and a solid surface. Univ. Newcastle, Mech. Engng Dept. T.N.-F.M. 83/5, and Imperial College Aero TN 83104.Google Scholar