caa a22 4500 44530295X CHVBK 20180317142603.0 cr unu---uuuuu 170323e20100401xx s 000 0 eng 10.1134/S0001433810020040 doi (NATIONALLICENCE)springer-10.1134/S0001433810020040 On the turbulent prandtl number in a stably stratified atmospheric boundary layer [Elektronische Daten] [A. Kurbatskii, L. Kurbatskaya] The results obtained from both atmospheric and laboratory measurements and from LES data show that, in the stably stratified flows of the atmospheric boundary layer, turbulent mixing occurs at gradient Richardson numbers Rig that significantly exceed one: the inverse turbulent Prandtl number Prt−1 decreases with an increase in the thermal flow stability. The decreasing trend of the inverse turbulent Ptandtl number is reproduced in a stably stratified atmospheric boundary layer in agreement with measurement data with the aid of an improved three-parameter turbulence model. In this model, a modified model that takes into account the effect of stratification in the expression for the time scale of the scalar field is used for the pressure-scalar correlation. Pleiades Publishing, Ltd., 2010 Kurbatskii A. Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, ul. Institutskaya 4/1, 630090, Novosibirsk, Russia aut Kurbatskaya L. Institute of Computational Mathematics amd Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, prosp. Akademica Lavrent'eva 6, 630090, Novosibirsk, Russia aut Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/2(2010-04-01), 169-177 0001-4338 46:2<169 2010 46 11485 https://doi.org/10.1134/S0001433810020040 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001433810020040 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kurbatskii A. Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, ul. Institutskaya 4/1, 630090, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Kurbatskaya L. Institute of Computational Mathematics amd Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences, prosp. Akademica Lavrent'eva 6, 630090, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/2(2010-04-01), 169-177 0001-4338 46:2<169 2010 46 11485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer