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- W2077892708 abstract "The decay rate of isotropic and homogeneous turbulence is known to be affected by the large-scale spectrum of the initial perturbations, associated with at least two canonical self-preserving solutions of the von K'arm'an--Howarth equation: the so-called Batchelor and Saffman spectra. The effect of long-range correlations in the decay of anisotropic flows is less clear, and recently it has been proposed that the decay rate of rotating turbulence may be independent of the large-scale spectrum of the initial perturbations. We analyze numerical simulations of freely decaying rotating turbulence with initial energy spectra $ensuremath{sim}{k}^{4}$ (Batchelor turbulence) and $ensuremath{sim}{k}^{2}$ (Saffman turbulence) and show that, while a self-similar decay can not be identified for the total energy, the decay is indeed affected by long-range correlations. The decay of two- and three-dimensional modes follows distinct power laws in each case, which are consistent with predictions derived from the anisotropic von K'arm'an--Howarth equation, and with conservation of anisotropic integral quantities by the flow evolution." @default.
- W2077892708 created "2016-06-24" @default.
- W2077892708 creator A5007082915 @default.
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- W2077892708 date "2012-12-26" @default.
- W2077892708 modified "2023-10-09" @default.
- W2077892708 title "Decay of Batchelor and Saffman rotating turbulence" @default.
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- W2077892708 doi "https://doi.org/10.1103/physreve.86.066320" @default.
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