The Universality of Dynamic Multiscaling in Homogeneous, Isotropic Turbulence

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dc.creatorRay, Samriddhi Sankar
dc.creatorMitra, Dhrubaditya
dc.creatorPandit, Rahul
dc.date2007-10-30
dc.date.accessioned2026-07-07T08:39:30Z
dc.date.available2026-07-07T08:39:30Z
dc.descriptionWe systematise the study of dynamic multiscaling of time-dependent structure functions in different models of passive-scalar and fluid turbulence. We show that, by suitably normalising these structure functions, we can eliminate their dependence on the origin of time at which we start our measurements and that these normalised structure functions yield the same linear bridge relations that relate the dynamic-multiscaling and equal-time exponents for statistically steady turbulence. We show analytically, for both the Kraichnan Model of passive-scalar turbulence and its shell model analogue, and numerically, for the GOY shell model of fluid turbulence and a shell model for passive-scalar turbulence, that these exponents and bridge relations are the same for statistically steady and decaying turbulence. Thus we provide strong evidence for dynamic universality, i.e., dynamic-multiscaling exponents do not depend on whether the turbulence decays or is statistically steady.
dc.description29 pages, 18 figures. For figures with better resolution, please download the preprint available at the website of the International Collaboration of Turbulence Research
dc.identifierhttps://arxiv.org/abs/0710.5678
dc.identifierhttp://arxiv.org/abs/0710.5678
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141093
dc.subjectChaotic Dynamics
dc.subjectStatistical Mechanics
dc.subjectFluid Dynamics
dc.titleThe Universality of Dynamic Multiscaling in Homogeneous, Isotropic Turbulence
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