@Article{DiasJúniorMarqSá:2015:LaEdSi,
author = "Dias J{\'u}nior, Cleo Q. and Marques Filho, Edson Pereira and
S{\'a}, Leonardo Deane de Abreu",
affiliation = "Instituto Federal de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e
Tecnologia do Par{\'a} and {Universidade Federal da Bahia (UFBA)}
and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "A large eddy simulation model applied to analyze the turbulent
flow above Amazon forest",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
year = "2015",
volume = "147",
pages = "143--153",
month = "Dec.",
keywords = "Amazon forest, Coherent structure, LES, Reynolds stress, Rougness
sublayer.",
abstract = "The occurrence of coherent structures (CS) above the Amazon forest
is analyzed. To perform this study, a large eddy simulation (LES)
model is used, which has been improved by the introduction of a
drag force which is representative of a typical Amazon forest
canopy. The results show that the flow is sensitive to the
presence of canopy and an inflexion point is simulated in wind
profiles. On the region between 1. h and 4 h several CS features
associated with turbulent flow regarding pressure, momentum
fluxes, skewness and vorticity fields are detected suggesting that
{"}roll{"} structures arranged perpendicularly to the mean wind
direction populate this region. Other interesting LES results
were: (i) the skewness of the wind velocity has also a maximum
value on the region, what indicates an asymmetric distribution of
the wind velocity relatively to its mean value, a fact that might
be associated with the generation process of the {"}roll{"}
structures; (ii) the horizontal vorticity component transversal to
the mean wind direction is greater than the vorticity components
on the other orthogonal directions suggesting that {"}roll{"}
structures move perpendicularly to the mean wind direction.",
doi = "10.1016/j.jweia.2015.10.003",
url = "http://dx.doi.org/10.1016/j.jweia.2015.10.003",
issn = "0167-6105",
language = "en",
targetfile = "2015_dias junior.pdf",
urlaccessdate = "03 jun. 2024"
}