A SIMPLE-MODEL OF COUNTERGRADIENT FLOW

被引：7
作者：
ROBSON, RE
MAYOCCHI, CL
机构：
[1] Department of Physics, James Cook University, Townsville
来源：
PHYSICS OF FLUIDS | 1994年 / 6卷 / 06期
关键词：
D O I：
10.1063/1.868201
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Countergradient flow is explained in terms of a nonlocal flux-gradient relationship, obtained through solution of the widely-used BGK or ''relaxation time'' model kinetic equation in one dimension for a layered source in an atmosphere with stationary turbulence. It is also pointed out that the classical formula derived by Taylor [Proc. London Math. Soc. Ser. A 20, 196 (1921)] for dispersion from a point source is fully recoverable from BGK theory.
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页码：1952 / 1954
页数：3
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