Rigorous estimates of the tails of the probability distribution function for the random linear shear model

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dc.creatorBronski, J. C.
dc.creatorMcLaughlin, R. M.
dc.date1999-09-07
dc.date.accessioned2026-07-07T05:57:18Z
dc.date.available2026-07-07T05:57:18Z
dc.descriptionIn previous work Majda and McLaughlin computed explicit expressions for the $2N$th moments of a passive scalar advected by a linear shear flow in the form of an integral over ${\bf R}^N$. In this paper we first compute the asymptotics of these moments for large moment number. We are able to use this information about the large N behavior of the moments, along with some basic facts about entire functions of finite order, to compute the asymptotics of the tails of the probability distribution function. We find that the probability distribution has Gaussian tails when the energy is concentrated in the largest scales. As the initial energy is moved to smaller and smaller scales we find that the tails of the distribution grow longer, and the distribution moves smoothly from Gaussian through exponential and ``stretched exponential''. We also show that the derivatives of the scalar are increasingly intermittent, in agreement with experimental observations, and relate the exponents of the scalar derivative to the exponents of the scalar.
dc.description26 Pages
dc.identifierhttps://arxiv.org/abs/physics/9909013
dc.identifierhttp://arxiv.org/abs/physics/9909013
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/87938
dc.subjectFluid Dynamics
dc.subjectStatistical Mechanics
dc.subjectMathematical Physics
dc.titleRigorous estimates of the tails of the probability distribution function for the random linear shear model
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