Název:
Second-order model for atmospheric turbulence without critical Richardson number
Autoři:
Caggio, M. ; Schiavon, M. ; Tampieri, F. ; Bodnár, Tomáš Typ dokumentu: Příspěvky z konference Konference/Akce: Topical Problems of Fluid Mechanics 2021, on-line (CZ), 20210217
Rok:
2021
Jazyk:
eng
Abstrakt: The purpose of this communication is to present a derivation of the non-dimensional vertical gradients of the mean wind speed and mean potential temperature expressed in terms of the so-called similarity functions for very stable conditions of the atmosphere where theoretical approaches provide conflicting results (see e.g. Luhar et al. [19]). The result is based on the analysis of the second-order model equations in the boundary layer approximations in which new heat flux equations are proposed. The model employs a recent closure for the pressure-temperature correlation, avoiding the issue of a critical treshold for the Richardson number.
Klíčová slova:
atmospheric boundary layer; second-order closure model; strong strati cation; turbulence parameterisations Číslo projektu: GA19-04243S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Proceedings of Topical Problems of Fluid Mechanics 2021, ISBN 978-80-87012-76-5, ISSN 2336-5781 Poznámka: Související webová stránka: https://doi.org/10.14311/TPFM.2021.002
Instituce: Matematický ústav AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v repozitáři Akademie věd. Původní záznam: http://hdl.handle.net/11104/0329271