Mesoscale modeling of thermal circulation forced by airflow and urban heat island

A. F. Kurbatskiy; L. I. Kurbatskaya

doi:10.1117/12.783389

14 February 2008 Mesoscale modeling of thermal circulation forced by airflow and urban heat island

A. F. Kurbatskiy, L. I. Kurbatskaya

Proceedings Volume 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 693619 (2008) https://doi.org/10.1117/12.783389
Event: Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2007, Buryatia, Russian Federation

Abstract

The modified three-parameter model of turbulence for a thermally stratified atmospheric boundary layer (ABL) is developed. The model is based on tensor-invariant parameterizations for the pressure-strain and pressure-temperature correlations that are more complete than the parameterizations used in the Mellor-Yamada model. The turbulent momentum and heat fluxes are calculated with explicit algebraic models obtained with the aid of symbol algebra from the transport equations for momentum and heat fluxes in the approximation of weakly equilibrium turbulence. The three-parameter model of thermally stratified turbulence is employed to obtain closed form algebraic expressions for the fluxes. The effects of urban roughness are parameterized. Results of 2D computational test of a 24-hour of the ABL evolution are presented. Comparison of the computed results with the available observational data and other numerical models shows that the proposed model is able to reproduce both the most important structural features of the turbulence in an urban canopy layer near the urbanized PBL surface and the effect of urban roughness on a global structure of the fields of wind and temperature over a city.

Citation Download Citation

A. F. Kurbatskiy and L. I. Kurbatskaya "Mesoscale modeling of thermal circulation forced by airflow and urban heat island", Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 693619 (14 February 2008); https://doi.org/10.1117/12.783389

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