Turbulent circulation above the surface heat source in a stably stratified environment

详细信息    查看全文

• 作者：A. F. Kurbatskii ; L. I. Kurbatskaya
• 关键词：turbulence ; planetary boundary layer ; urban heat island ; large ; scale circulation ; numerical modeling
• 刊名：Thermophysics and Aeromechanics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：23
• 期：5
• 页码：677-692
• 全文大小：
• 刊物主题：Thermodynamics;
• 出版者：Kutateladze Institute of Thermophysics SB RAS
• ISSN：1531-8699
• 卷排序：23

文摘

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.