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The ‘colour polarigraph’ -a simple method for determining the two-dimensional distribution of sugar concentration

Published online by Cambridge University Press:  20 April 2006

Barry R. Ruddick
Barry R. Ruddick
Affiliation:
Research School of Earth Sciences, The Australian National University, P.O. Box 4, Canberra, 2600, Australia
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Abstract

A method is described for photographically recording the two-dimensional distribution of sugar concentration in a tank, which typically yields a resolution of 0·01 in weight fraction sugar. The tank image is coloured according to the sugar concentration, giving a quantitative visual record of sugar contours. The technique is demonstrated in photographs of a laboratory model of an oceanic front, in which interleaving quasi-horizontal layers are formed by double-diffusive effects.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 109 , August 1981 , pp. 277 - 282
Copyright
© 1981 Cambridge University Press

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References

Ruddick, B. R. & Shirtcliffe, T. G. L. 1979 Data for double diffusers: Physical properties of aqueous salt—sugar solutions. Deep-Sea Res. 26, 775–787.Google Scholar
Ruddick, B. R. & Turner, J. S. 1979 The vertical length scale of double-diffusive intrusions. Deep-Sea Res. 26, 903–913.Google Scholar
Turner, J. S. 1973 Buoyancy Effects in Fluids. Cambridge University Press.
Washburn, E. W. 1927 The International Critical Tables. McGraw-Hill.