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Caminhos para a complexidade na camada limite atmosférica noturna
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2011-12-09)
The focus of the present thesis is the nocturnal atmospheric boundary layer, under very stable conditions.
In such situation, the turbulence production by the vertical wind shear may have similar magnitude to
the total ...
Diferentes técnicas de condicionamento em séries temporais turbulentas
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2005-12-09)
The dynamics process of the atmosphere near Earth ground is controled by two main forcings, termical and machanics. These process are reponsible for the atmospheric flow variability in this layer, and this variability ...
Modelo simplificado para turbulência na camada limite noturna
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2016-03-08)
The appropriate estimation of turbulent fluxes in very stable conditions is a great challenge
for numerical models that simulate the average behavior of the stable boundary layer.
Although many features of the flow are ...
Absorption of waves by large-scale winds in stratified turbulence
(American Physical Society, 2015-03)
The atmosphere is a nonlinear stratified fluid in which internal gravity waves are present. These waves interact with the flow, resulting in wave turbulence that displays important differences with the turbulence observed ...
Optimization of RANS turbulence models using genetic algorithms to improve the prediction of wind pressure coefficients on low-rise buildings
(Elsevier Science, 2019-10)
Being associated with natural ventilation, the pressure distribution on surfaces is relevant for energy consumption, thermal comfort, and air quality in buildings. The aim of this work is to present a simulation-based ...
Vertical drafts and mixing in stratified turbulence: Sharp transition with Froude number
(Europhysics Letters, 2018-08)
We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from direct numerical simulations ...
Development and characterization of a simulation module in the temporal domain for experimental optical atmospheric links affected by optical turbulence with gamma‐gamma probability density function
(2020-06-08)
We present the development and characterization of a simulation module in the temporal domain for optical atmospheric links affected by optical turbulence with Gamma‐Gamma probability density function. We generate time ...
Characterizing d-dimensional quantum channels by means of quantum process tomography
(Optical Society of America, 2018-09)
In this Letter, we propose a simple optical architecture based on phase-only programmable spatial light modulators, in order to characterize general processes on photonic spatial quantum systems in a >2 Hilbert space. We ...
Wind-profiling doppler radars for tropical atmospheric research
(American Geophysical Union, 1990-12)
The past decade has seen a rapid increase in the use of wind profilers in atmospheric research [Gage, 1990]. Briefly, wind profilers are Doppler radars that observe winds from Doppler shifts of "clear air" atmospheric ...