Numerical model of the urban heat island in a calm and stably stratified environment

A. Kurbatskiy; L. Kurbatskaya

doi:10.1117/12.2203154

19 November 2015 Numerical model of the urban heat island in a calm and stably stratified environment

A. Kurbatskiy, L. Kurbatskaya

Proceedings Volume 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics; 968058 (2015) https://doi.org/10.1117/12.2203154
Event: XXI International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2015, Tomsk, Russian Federation

Abstract

The RANS high close approach for the turbulent fluxes of momentum, heat and mass for simulating of the circulation structure and dispersion pollutant over the urban heat island in a stably stratified environment under nearly calm conditions is formulated. The turbulent fluxes of momentum − u_iu_j , heat −u_iθ and mass −u_ic in this approach determined from the gradient diffusion type models with the turbulent kinetic energy (TKE), its spectral consumption (or dissipation), the temperature variance and the covariance for cθ as parameters which are obtained from transport equations. Such the RANS approach minimizes difficulties in the turbulent transport modeling in a stably stratified environment and reduces efforts needed for the numerical implementation of the numerical model. The simulation results demonstrates that the three-four equations RANS approach is able to predict the structure of turbulent circulation flow induced by the heat island that is in good agreement with the experimental data.

Citation Download Citation

A. Kurbatskiy and L. Kurbatskaya "Numerical model of the urban heat island in a calm and stably stratified environment", Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 968058 (19 November 2015); https://doi.org/10.1117/12.2203154

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