S. V. Kostrykin, A. A. Khapaev, I. G. Yakushkin, “On the decay law of quasi-two-dimensional turbulence”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 95, Issue 10,Pages <nobr>583

This article is cited in 3 papers

PLASMA, HYDRO- AND GAS DYNAMICS

On the decay law of quasi-two-dimensional turbulence

S. V. Kostrykin^ab, A. A. Khapaev^b, I. G. Yakushkin^b

^a Institute of Numerical Mathematics, Russian Academy of Sciences, Moscow
^b A. M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences

Abstract: Laboratory measurements of decaying quasi-two-dimensional turbulence in thin fluid layers with various depths have been performed. It has been shown that decay at large Reynolds numbers corresponds to a non-linear bottom friction with the coefficient satisfying the law $\lambda\sim(\nu/h^2)^{1/2}|K|^{1/4}$ following from theoretical estimates, where $K$ is the Okubo-Weiss function depending on the enstrophy and degree of ellipticity of vortices. It has been shown that the structure of the flow changes in the decay process.

Received: 05.04.2012
Revised: 13.04.2012