Diffusion of a passive impurity in a random velocity field

[摘要] The method of characteristic functional is used for statistical description of the impurity concentration distribution in the random velocity field. A closed set of equations for a mean concentration response to a change of the external source density and for a pair correlation of the concentration fluctuations is obtained.

[发布机构] A. Ishlinsky Institute for Problems in Mechanics, RAS Vernadsky Street 101(1), Moscow; 119526, Russia^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Concentration fluctuation;External sources;Impurity concentration;Mean concentrations;Method of characteristics;Pair correlations;Random velocity fields;Statistical descriptions