Title

Probability Density Function Of A Passive Scalar Gradient

Abstract

Fractal and multi-fractal models are used to derive the probability density function (PDF) for the gradient of a passive scalar diffusing in a random velocity field. Although the PDF is symmetrical, it is non-Gaussian and compares reasonably well with the measured PDF. In the process, we also provide a unified systematic framework to derive the appropriate scalar microscales for the following regimes: inertial-diffusive range; viscous-convective range; viscous-diffusive range. (C) 2000 Elsevier Science B.V.

Publication Date

9-18-2000

Publication Title

Physics Letters, Section A: General, Atomic and Solid State Physics

Volume

274

Issue

3-4

Number of Pages

152-161

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/S0375-9601(00)00499-0

Socpus ID

0034683660 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0034683660

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