Large eddy simulation of coherent structures over forest canopy - Archive ouverte HAL Accéder directement au contenu
Chapitre D'ouvrage Année : 2010

Large eddy simulation of coherent structures over forest canopy

Résumé

This paper deals with the numerical simulation (using a LES approach) of the interaction between an atmospheric boundary layer (ABL) and a canopy, representing a forest cover. This problem was studied for a homogeneous configuration representing the situation encountered above a continuous forest cover, and a heterogeneous configuration representing the situation similar to an edge or a clearing in a forest. The numerical results, reproduced correctly all the main characteristics of this flow, as reported in the literature: the formation of a first generation of coherent structures aligned transversally from the wind flow direction, the reorganisation and the deformation of these vortex tubes to horse shoe structures. The results obtained, introducing a discontinuity in the canopy (reproducing a clearing or a fuel break in a forest), were compared with experimental data collected in a wind tunnel. The results confirmed the existence of a strong turbulence activity inside the canopy at a distance equal to 8 times the height of the canopy, referenced in the literature as an Enhance Gust Zone (EGZ) characterized by a local peak of the skewness factor.
Fichier principal
Vignette du fichier
Gravilov2010.pdf (181.22 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité

Dates et versions

hal-01024672 , version 1 (22-04-2023)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Konstantin Gavrilov, Gilbert Accary, Dominique Morvan, Dimitry Lyubimov, Oleg A Bessonov, et al.. Large eddy simulation of coherent structures over forest canopy. Deville M.; Lê T-H.; Sagaut P. Turbulence and Interactions: Proceedings the TI 2009 conference, Springer, pp.143-149, 2010, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 9783642141386. ⟨10.1007/978-3-642-14139-3_17⟩. ⟨hal-01024672⟩
107 Consultations
9 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More