Journal
JOURNAL OF FLUID MECHANICS
Volume 809, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2016.699
Keywords
general fluid mechanics; turbulence theory
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Funding
- RScF [14-22-00259]
- Russian Science Foundation [14-22-00259] Funding Source: Russian Science Foundation
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We analyse velocity fluctuations inside coherent vortices generated as a result of the inverse cascade in the two-dimensional (2-D) turbulence in a finite box. As we demonstrated in Kolokolov & Lebedev (Phys. Rev E, vol. 93, 2016, 033104), the universal velocity profile, established in Laurie et al. (Phys. Rev. Len., vol. 113, 2014, 254503), corresponds to the passive regime of the flow fluctuations. This property enables one to calculate correlation functions of the velocity fluctuations in the universal region. We present the results of the calculations that demonstrate a non-trivial scaling of the structure function. In addition the calculations reveal strong anisotropy of the structure function.
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