Vol. 30, issue 06, article # 12
Kurbatskaya L. I., Kurbatskii A. F. Computationally efficient turbulence model for pollution propagation simulation. // Optika Atmosfery i Okeana. 2017. V. 30. No. 06. P. 524–528. DOI: 10.15372/AOO20170612 [in Russian].Copy the reference to clipboard
Abstract:
The combined effect of orography and temperature stratification on the dispersion of pollutants in an urban heat island is simulated on the basis of three-parametric E – e – <q2> (Т–RANS) approach to thermally penetrating convection above the heat island. Two models of the concentration turbulent flow are used for the dispersion of a tracer from a surface source into a stably stratified atmosphere <uic> i.e., the implicit algebraic model and calculation from a prognostic equation. The correlation <cq> between the concentration and temperature fluctuations is found from the solution of a prognostic equation in the both models. The algebraic model minimizes the difficulties in the simulation of turbulent transfer in a stably stratified atmosphere and provides for the results with acceptable accuracy as compared to the complete prognostic model of the concentration turbulent flow.
Keywords:
turbulence, stable stratification, atmospheric boundary layer, pollution dispersion, modelin
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