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Author Xia, H. ♦ Punzmann, H. ♦ Falkovich, G. ♦ Shats, M. G.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-06-18
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Physics - Fluid Dynamics ♦ Physics - Atmospheric and Oceanic Physics ♦ physics:physics
Abstract We present experimental results on turbulence generated in thin fluid layers in the presence of a large-scale coherent flow, or a spectral condensate. It is 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 mesoscale 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.
Description Reference: Physical Review Letters, 101, 194504 (2008)
Educational Use Research
Learning Resource Type Article
Page Count 4


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