Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Analysis of the Turbulence Parameterisations for the Atmospheric Surface Layer
M. Caggio,T. Bodnár
Abstract:
The purpose of this short communication is to present a method that aims to express the turbulent variables in the atmospheric surface-layer in function of the stability of the atmosphere. The case of very stable conditions (strong strati cation), where theoretical approaches provide conflicting results (see Luhar et al. [11]), is analysed in detail to provide some insight into the limits of applicability for some of the most popular models of turbulence. The problem of the existence of the critical flux Richardson number is also taken into account.
Keywords:
Atmospheric boundary layer, Monin-Obukhov similarity theory, turbulence parameterisations, strong strati cation, critical Richardson number

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2018.005

In Proceedings Topical Problems of Fluid Mechanics 2018, Prague, 2018 Edited by David Šimurda and Tomáš Bodnár, pp. 31-38 ISBN 978-80-87012-65-9 (Print) ISSN 2336-5781 (Print)