Topological and fractal properties of turbulent passive scalar fluctuations at small scales |
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Authors: | A. Bershadskii |
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Affiliation: | (1) Ramat-Aviv, P. O. Box 39953, 61398 Tel-Aviv, Israel |
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Abstract: | Corrections of Batchelor's spectral law –1 of passive scalar-fluctuations are obtained by taking into account the topological instabilities of small-scale vortex sheets: –4/3 for supercritical and –5/4 for subcritical regimes. The corresponding fractal dimensions of the scalar interface areD=8/3 for supercritical andD=11/4 for subcritical regimes. Good agreement with experimental data is established. |
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Keywords: | Helicity vortex sheets spectra topological instabilities |
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