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Two-dimensional turbulence inside a strong vortex

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If you have a question about this talk, please contact Mustapha Amrani .

The Nature of High Reynolds Number Turbulence

I will present experimental results on turbulence generated in thin fluid layers in the presence of a large-scale coherent flow, or a spectral condensate. It will be shown that the condensate modifies the third-order velocity moment in a much wider interval of scales than the second one. The modification may include the change of sign of the third moment in the inverse cascade. This observation may help resolve a controversy on the energy flux in meso-scale atmospheric turbulence (10-500 km): to recover a correct energy flux from the third velocity moment one needs first to subtract the coherent flow. We find that the condensate also increases the velocity flatness. I will briefly present a theoretical consideration for condensate-turbulence interaction.

This talk is part of the Isaac Newton Institute Seminar Series series.

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