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Measurements of a laminar wake in a confined stratified fluid

Published online by Cambridge University Press:  29 March 2006

P. Laws
Affiliation:
Department of the Mechanics of Fluids, University of Manchester
T. N. Stevenson
Affiliation:
Department of the Mechanics of Fluids, University of Manchester

Abstract

Two-dimensional upstream and downstream wakes are produced by extremely slowly moving cylinders in a tank containing a linearly stratified salt solution. The upstream and downstream wakes appear to be of comparable strength, consistent with the symmetry predicted by theories that take account of density diffusion as well as viscosity. This contrasts with the quasi-non-diffusive régime recently studied experimentally by Browand & Winant (1972). The present velocity profiles are essentially similar to those predicted by diffusion theories, althought the magnitudes of the velocities appear to be greatly attenuated by the proximity of the upstream and downstream walls.

Type
Research Article
Copyright
© 1972 Cambridge University Press

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References

Browand, F. K. & Winant, C. D. 1972 Blocking ahead of a cylinder moving in a stratified fluid: an experiment. Geophy. Fluid Dyn. 3. (To be published.)Google Scholar
Foster, M. R. & Saffman, P. G. 1970 The drag of a body moving transversely in a confined stratified fluid. J. Fluid Mech. 43, 407418Google Scholar
Freund, D. & Meyer, R. E. 1972 On the mechanism of blocking in a stratified fluid J. Fluid Mech. 54, 719744.Google Scholar
Graebel, W. P. 1969 On the slow motion of bodies in stratified and rotating fluids Q. J. Mech. Appl. Math. 22, 3954.Google Scholar
Janowitz, G. S. 1967 On wakes in stratified fluids. Dept. Mechanics, The John Hopkins University. Tech. Rep. no. 22 (ONR series) Nonr-4010(01).Google Scholar
Janowitz, G. S. 1968 On wakes in stratified fluids J. Fluid Mech. 33, 417432.Google Scholar
Janowitz, G. S. 1971 The slow transverse motion of a flat plate through a non-diffusive stratified fluid J. Fluid Mech. 47, 171181.Google Scholar
Stevenson, T. N. & Thomas, N. H. 1969 Two-dimensional internal waves generated by a travelling oscillating cylinder J. Fluid Mech. 36, 505511.Google Scholar