Abstract
The results of laboratory measurements of decaying quasi-two-dimensional turbulence in a thin liquid layer are considered. It is shown that the enstrophy-to-energy ratio decreases according to a power law on a certain decay interval. The exponent in the power law is a function of the Reynolds number. The enstrophy decay is found to be anomalously slow as predicted in a number of numerical studies. It is shown that the anomalous decay in the quasi-two-dimensional flow under investigation is not due to intense vortex formation as in the numerical decaying turbulence, but due to the limited range of scales on which a flow can be regarded as two-dimensional.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 122, No. 1, 2002, pp. 57–67.
Original Russian Text Copyright © 2002 by Danilov, Dovzhenko, Dolzhanski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Kochina.
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Danilov, S.V., Dovzhenko, V.A., Dolzhanskii, F.V. et al. Decaying quasi-two-dimensional turbulence in a thin liquid layer. J. Exp. Theor. Phys. 95, 48–56 (2002). https://doi.org/10.1134/1.1499900
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DOI: https://doi.org/10.1134/1.1499900