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

The Effect of Submeso Motions on Second-Order Moment Budgets in the Stable Atmospheric Boundary Layer
Schiavon M., Tampieri F., Caggio M., Bodnár T.
Abstract:
The effect of submeso motions on small-scale turbulence is studied considering the budget of the vertical flux of stream-wise momentum, ⟨uw⟩, in the atmospheric stable boundary layer (SBL). A parameter expressing the strength of the submeso effect is defined, and the budget is evaluated from observations both for small and large submeso effect. It results that submeso motions affect the efficiency of the vertical transport by small-scale turbulence, having implications on the terms composing the momentum flux budget and on its corresponding closures.
Keywords:
Submeso Motions, Pressure Redistribution, Second-Order Moment Equations

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2020.025

In Proceedings Topical Problems of Fluid Mechanics 2020, Prague, 2020 Edited by David Šimurda and Tomáš Bodnár, pp. 192-199 ISBN 978-80-87012-74-1 (Print) ISSN 2336-5781 (Print)