Современные проблемы прикладной математики и механики: теория, эксперимент и практика

Международная конференция, посвященная 80-летию академика Н.Н.Яненко.
Новосибирск, Академгородок, 24 - 29 июня 2001 года.

Тезисы докладов

Доклады новосибирских участников

Развитие турбулентной циркуляции над поверхностным источником тепла в устойчиво стратифицированной среде

Курбацкий А.Ф., Курбацкая Л.И.

Институт теоретической и прикладной механики СО РАН (Новосибирск)

A three-equation model of the turbulent transport of momentum and heat for simulating a circulation structure over the heat island in a stably stratified environment under nearly calm conditions is formulated. The turbulent kinetic energy, its spectral flux (dissipation), and the dispersion of turbulent fluctuations of temperature are found from differential equations, thus the correct modeling of transport processes in the interface layer with the counter-gradient heat flux is assured. Turbulent fluxes of momentum and heat are determined from the three-equation turbulence model minimizes difficulties in simulating the turbulent transport in a stably stratified environment and reduces efforts needed for the numerical implementation of the model. Numerical simulation of the turbulent structure of the penetrative convection over the heat island under conditions of stably stratified atmosphere demonstrates that the three-equation model is able to predict the circulation induced by the heat island, temperature distribution, root-mean-square fluctuations of the turbulent velocity and temperature fields, and spectral turbulent kinetic energy flux that are in good agreement with the experimental data and results of LES.

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Примечание. Тезисы докладов публикуются в авторской редакции

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