Dynamic multiscaling in two-dimensional fluid turbulence

S.S. Ray, D. Mitra, P. Perlekar, R. Pandit

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We obtain, by extensive direct numerical simulations, time-dependent and equal-time structure functions for the vorticity, in both quasi-Lagrangian and Eulerian frames, for the direct-cascade regime in two-dimensional fluid turbulence with air-drag-induced friction. We show that different ways of extracting time scales from these time-dependent structure functions lead to different dynamic-multiscaling exponents, which are related to equal-time multiscaling exponents by different classes of bridge relations; for a representative value of the friction we verify that, given our error bars, these bridge relations hold.
Original languageEnglish
Article number184503
Pages (from-to)184503-1/5
JournalPhysical Review Letters
Volume107
Issue number18
DOIs
Publication statusPublished - 2011

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