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The use of schlieren and shadowgraph techniques in the study of flow patterns in density stratified liquids

Published online by Cambridge University Press:  28 March 2006

D. E. Mowbray
D. E. Mowbray
Affiliation:
Department of the Mechanics of Fluids, University of Manchester Present address: Royal Aircraft Establishment, Bedford, England.
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Abstract

Various methods of establishing fluid media stably stratified in either temperature or the concentration of a foreign constituent are compared. A method used to construct a salt solution with precisely predetermined stratification is described. The Euler-Lagrange equations are solved exactly for a medium whose refractive index varies linearly in one dimension; the solution shows that a schlieren system may be used. For media with non-linear one-dimensional variation of refractive index, a modified shadowgraph technique may be employed. A device for the quantitative evaluation of a one-dimensional stratification is outlined and an example of its use is given.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 27 , Issue 3 , 24 February 1967 , pp. 595 - 608
Copyright
© 1967 Cambridge University Press

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References

Beams, J. W. 1955 Shadow and Schlieren Methods. High Speed Aerodynamics and Jet Propulsion. 9, 22–44. Oxford University Press.
Ellison, T. H. & Turner, J. S. 1959 J. Fluid Mech. 8, 514.
Ellison, T. H. & Turner, J. S. 1960 J. Fluid Mech. 8, 529.
Lamm, O., Svedberg, T. & Peterson, P. O. 1939 The Ultracentrifuge. Oxford University Press.
Mowbray, D. E. & Rarity, B. S. H. 1967 (To be published.)
Webster, C. A. G. 1964 J. Fluid Mech. 19, 221.