Original title: Second-order model for atmospheric turbulence without critical Richardson number
Authors: Caggio, M. ; Schiavon, M. ; Tampieri, F. ; Bodnár, Tomáš
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2021, on-line (CZ), 20210217
Year: 2021
Language: eng
Abstract: 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.
Keywords: atmospheric boundary layer; second-order closure model; strong strati cation; turbulence parameterisations
Project no.: GA19-04243S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of Topical Problems of Fluid Mechanics 2021, ISBN 978-80-87012-76-5, ISSN 2336-5781
Note: Související webová stránka: https://doi.org/10.14311/TPFM.2021.002

Institution: Institute of Mathematics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0329271

Permalink: http://www.nusl.cz/ntk/nusl-508506


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