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The thermal bar

Published online by Cambridge University Press:  26 April 2006

S. S. Zilitinkevich ,
K. D. Kreiman  and
A. Yu. Terzhevik
S. S. Zilitinkevich
Affiliation:
Institute of Limnology, Academy of Sciences of the USSR, 196199, St Petersburg, USSR
K. D. Kreiman
Affiliation:
Institute of Limnology, Academy of Sciences of the USSR, 196199, St Petersburg, USSR
A. Yu. Terzhevik
Affiliation:
Institute of Limnology, Academy of Sciences of the USSR, 196199, St Petersburg, USSR
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Abstract

A simple theoretical model of the thermal bar is derived on the basis of heat budget equations for the following three zones of a wedge-shaped water basin warmed from above: (i) stably stratified shallow warm-water zone; (ii) vicinity of the bar; (iii) convectively mixed deep cold zone. In contrast to the traditional approach, advective warming of the vicinity of the bar and associated facilitating of the thermal bar propagation are taken into account. Theoretical predictions are compared with the data of lacustrine and laboratory measurements taken from current literature. New laboratory experiments have been carried out to examine the laminar regime of the thermal bar.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 236 , March 1992 , pp. 27 - 42
Copyright
© 1992 Cambridge University Press

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