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© Research
Publication : Physical review letters

Anomalous self-similarity in a turbulent rapidly rotating fluid

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Physical review letters - 28 Feb 2002

Baroud CN, Plapp BB, She ZS, Swinney HL

Link to Pubmed [PMID] – 11909405

Phys. Rev. Lett. 2002 Mar;88(11):114501

Our velocity measurements on quasi-two-dimensional turbulent flow in a rapidly rotating annulus yield self-similar (scale-independent) probability distribution functions for longitudinal velocity differences, deltav(l) = v(x+l)-v(x). These distribution functions are strongly non-Gaussian, suggesting that the coherent vortices play a significant role. The structure functions approximately l(zeta)p exhibit anomalous scaling: zeta(p) = p / 2 rather than the expected zeta(p) = p / 3. Correspondingly, the energy spectrum is described by E(k) approximately k(-2) rather than the expected E(k) approximately k(-5/3).