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Proceedings Paper

Understanding of counter-gradient heat flux in lower atmosphere based on the second order RANS-approach
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Paper Abstract

The nonlocality of the mechanism of turbulent heat transfer in the atmospheric boundary layer over a rough surface manifests itself in the form of bounded areas of countergradient heat transfer, which are diagnosed from analysis of balance items in the transport equation for the variance of temperature fluctuations and from calculation of the coefficients of turbulent momentum and heat transfer invoking the model of gradient diffusion. It is shown that countergradient heat transfer in local regions is caused by turbulent diffusion or by the term of the divergence of triple correlation in the balance equation for the temperature variance.

Paper Details

Date Published: 29 November 2016
PDF: 7 pages
Proc. SPIE 10035, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 100355L (29 November 2016); doi: 10.1117/12.2248144
Show Author Affiliations
A. Kurbatskii, Christianovich Institute of Theoretical and Applied Mechanics (Russian Federation)
L. Kurbatskaya Sr., Institute of Computational Mathematics and Mathematical Geophysics (Russian Federation)

Published in SPIE Proceedings Vol. 10035:
22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Gennadii G. Matvienko; Oleg A. Romanovskii, Editor(s)

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