Instability of the thermal bar formed in a gravity current |
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Authors: | Bukreev V I Gavrilov N V |
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Institution: | 1.Lavrentiev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 15, Novosibirsk, 630090, Russia ; |
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Abstract: | The results of experiments concerning fresh water at the temperature more than 4°C released along a free surface into water
with a temperature less than 4°C are presented. As a result of Relay-Taylor instability caused by the nonmonotonic dependence
of water density on the temperature, the denser water initially sank to the inclined bottom. At the same time, a vertical
front separating water masses less and greater than 4°C formed. In limnology such an effect is called the “thermal bar.” Under
certain conditions along with the Relay-Taylor instability, the Kelvin-Helmholtz instability tending to destroy the vertical
front was also observed. Corresponding illustrations are presented. |
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Keywords: | |
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