Theoretical modelling of buoyancy-driven turbulent flows

被引:3
|
作者
Okamoto, M
机构
[1] Institute of Industrial Science, University of Tokyo, Minato-ku, Tokyo 106, 7-22-1, Roppongi
关键词
two-scale direct-interaction approximation (TSDIA); Reynolds stress; heat flux; gravity-related term; epsilon model equation; epsilon(theta) model equation;
D O I
10.1143/JPSJ.65.2044
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Buoyancy-contributing turbulence is investigated from a viewpoint of the turbulence modelling with an aid of a two-scale direct-interaction approximation (TSDIA). Applying the spectral inertial-range form to the second-order analysis of the TSDIA, the ensemble-mean representations for the Reynolds stress, the heat flux, and model equations for the turbulent-energy and thermal-intensity dissipation rates are derived and discussed in detail.
引用
收藏
页码:2044 / 2059
页数:16
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