variavel0=<b>Juliana B. R. Loureiro</b> - jbrloureiro@serv.com.ufrj.br DEM/EE/UFRJ
<b>Daniel A. Rodrigues</b> - darodrigues@serv.com.ufrj.br DEM/EE/UFRJ
<b>Marcio Cataldi</b> - mcataldi@serv.com.ufrj.br PEM/COPPE/UFRJ
<b>Atila P. Silva Freire</b> - atila@serv.com.ufrj.br PEM/COPPE/UFRJ
<b>Abstract.</b> This paper concerns the use of thermal anemometry for simultaneous measurements of velocity and temperature fields in wind tunnel simulated atmospheric flows. The experiments were carried out in facilities of the Laboratory of Turbulence Mechanics (PEM/COPPE/UFRJ), and a detailed description of the whole experimental apparatus and calibration procedures is given. This work is focused on the investigation of the most suitable calibration laws, among a set classical ones, for single and X-hot-wires as well as cold-wires for measurements in low Reynolds number and stratified flows. The advantages and limitations of the methods will be discussed. The results are shown in the form of tables, equations and calibration curves for temperature and velocity data, and for two components of velocity. A careful uncertainty analysis of the results is also given. Some measurements of simulated stratified atmospheric conditions are presented so as to illustrate the potencial of hot wire anemometry for extracting information on various aspects of the turbulent motion.
<b>Keywords.</b> Turbulence, experimental methods, hot-wire anemometry, temperature measurements, calibration.