Turbulent circulation above the surface heat source in a stably stratified environment
- Authors: Kurbatskii A.F.1, Kurbatskaya L.I.2
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Affiliations:
- Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS
- Issue: Vol 23, No 5 (2016)
- Pages: 677-692
- Section: Article
- URL: https://journals.rcsi.science/1531-8699/article/view/216627
- DOI: https://doi.org/10.1134/S0869864316050061
- ID: 216627
Cite item
Abstract
The results of the numerical modeling of turbulent structure of the penetrating convection above the urban heat island with a small aspect ratio in a stably stratified medium at rest are presented. The gradient diffusion representations for turbulent momentum and heat fluxes are used, which depend on three parameters — the turbulence kinetic energy, the velocity of its spectral expenditure, and the dispersion of temperature fluctuations. These parameters are found from the closed differential equations of balance in the RANS approach of turbulence description. The distributions of averaged velocity and temperature fields as well as turbulent characteristics agree well with measurement data.
About the authors
A. F. Kurbatskii
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
Author for correspondence.
Email: kurbat@itam.nsc.ru
Russian Federation, Novosibirsk
L. I. Kurbatskaya
Institute of Computational Mathematics and Mathematical Geophysics SB RAS
Email: kurbat@itam.nsc.ru
Russian Federation, Novosibirsk