Title

Probability density function of a passive scalar gradient

Authors

Authors

B. K. Shivamoggi;R. A. Antonia

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Phys. Lett. A

Keywords

FULLY-DEVELOPED TURBULENCE; ISOTROPIC TURBULENCE; TEMPERATURE-FLUCTUATIONS; UNIFIED FORMULATION; VELOCITY-GRADIENTS; GRID; TURBULENCE; SHEAR FLOWS; DISSIPATION; STATISTICS; FIELDS; Physics, Multidisciplinary

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. All rights reserved.

Journal Title

Physics Letters A

Volume

274

Issue/Number

3-4

Publication Date

1-1-2000

Document Type

Article

DOI Link

http://dx.doi.org/10.1016/s0375-9601(00)00499-0

Language

English

First Page

152

Last Page

161

WOS Identifier

WOS:000089551900009

ISSN

0375-9601

Recommended Citation

"Probability density function of a passive scalar gradient" (2000). Faculty Bibliography 2000s. 2807.
https://stars.library.ucf.edu/facultybib2000/2807