Vol. 25, issue 07, article # 10

Mamysheva A. A., Odintsov S. L. Normalized variance of wind velocity components in the atmospheric surface layer over an urban territory
. // Optika Atmosfery i Okeana. 2012. V. 25. No. 07. P. 621–628 [in Russian].

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Abstract:

Root-mean-square (RMS or standard) deviations of the wind vector, normalized to the friction velocity in the atmospheric surface layer over an urban territory, have been analyzed. Experimental data have been used to study the dependence of the normalized standard deviations on the mean wind speed and direction, as well as the type of temperature stratification. The applicability of usually used models of normalized standard deviations was analyzed. It was found, that the tested models failed to provide the proper simulation quality under conditions of the experiment. An alternative approach to simulation of the normalized standard deviations and the total kinetic energy of turbulence was proposed. This approach increases the simulation quality from two to three times as compared to the considered models. The decisive parameter in the obtained models of the normalized standard deviations and the kinetic energy of turbulence is the mean wind direction.

Keywords:

variance of wind velocity components, kinetic energy of turbulence, simulation, wind direction, atmospheric surface layer, friction velocity, stratification, urban territory