Features of turbulent momentum and heat transfer in a stably stratified boundary layer over a rough surface |
| |
| Authors: | A F Kurbatskiy L I Kurbatskaya |
| |
| Institution: | (1) Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Institutskaya ul.4/1, Novosibirsk, 630090, Russia;(2) Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia;(3) Institute of Numerical Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 6, Novosibirsk, 630090, Russia |
| |
| Abstract: | The features of the structure of a stable boundary layer over an urbanized surface are studied using a nonlocal model for the turbulent momentum and heat fluxes, which physically adequately takes into account the effect of buoyancy on turbulent transfer. The transformation of the structure of the boundary layer during transition from a state of convective mixing to a stable state is described by unified expressions for the turbulent momentum and heat fluxes. In some known schemes, different models are used for unstable and stable states. The model reproduces a stable dependence of the Prandtl number on the Richardson number and countergradient heat transfer in a strongly stable boundary layer. The results of numerical simulation are compared to the data of a laboratory experiment and the data obtained using the large-eddy simulation (LES) method. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
