A SIMPLE-MODEL OF COUNTERGRADIENT FLOW

Authors
ROBSON RE MAYOCCHI CL
Citation
Re. Robson et Cl. Mayocchi, A SIMPLE-MODEL OF COUNTERGRADIENT FLOW, Physics of fluids, 6(6), 1994, pp. 1952-1954
Citations number
15
Categorie Soggetti
Mechanics,"Phsycs, Fluid & Plasmas
Journal title
Physics of fluids → ACNP
ISSN journal
10706631
Volume
6
Issue
6
Year of publication
1994
Pages
1952 - 1954
Database
ISI
SICI code
1070-6631(1994)6:6<1952:ASOCF>2.0.ZU;2-Q
Abstract
Countergradient flow is explained in terms of a nonlocal flux-gradient relationship, obtained through solution of the widely-used BGK or ''r elaxation time'' model kinetic equation in one dimension for a layered source in an atmosphere with stationary turbulence. It is also pointe d out that the classical formula derived by Taylor [Proc. London Math. Soc. Ser. A 20, 196 (1921)] for dispersion from a point source is ful ly recoverable from BGK theory.