**Author details**

*Boundary Layer Flows - Theory, Applications and Numerical Methods*

different incident flows were used.

**Acknowledgements**

considering the urban environment and the surrounding topography realized in the UNNE wind tunnel, where full-depth simulation flows were used. An experimental study of a low structure, specifically an airport where a part-depth boundary layer simulation developed at the UNNE wind tunnel, was utilized. Some wind tunnel applications to the aerodynamic analysis of cable-stayed bridges are shown where

Then, a pollutant atmospheric dispersion study realized in the UFRGS wind tunnel was shown. ABL flows obtained with low velocities were used to simulate the gas plume emission. A case study applied to the Brazilian Launch Center of

Finally, a recent wind tunnel study of the flow in the wake of wind turbines is presented. Measurements of the flow characteristics upwind and downwind of the turbine rotor were analyzed. Comparison of the turbulence spectra were also

Also numerical methods are used mainly for forecasting and studying the dynamics of the airflow over large surfaces, usually with domains of several square kilometers. The Weather Research and Forecasting (WRF) model, which is a numerical weather prediction and atmospheric simulation system, is an example of this type of computational modeling. The size of the domain of the simulation of these models is much larger than the simulated spaces of boundary layer flows in a wind tunnel. However, some efforts are being made to link results from computational model and experimental data. In South America, for example, a WRF model was used by Puliafito et al. [26] to simulate mesoscale events of Zonda winds, and the obtained results were compared with meteorological data. The next objective of this research is to try the physical simulation of these events in a wind tunnel [27].

This research was partially funded by Conselho Nacional de Desenvolvimento

Científico e Tecnológico (CNPq, Brazil) and Secretaría General de Ciencia y Técnica, Universidad Nacional del Nordeste (SGCYT-UNNE, Argentina).

Alcântara to evaluate the emitted gas dispersion process is also shown.

developed to evaluate the rotor effects on the turbine wake flow.

**142**

Adrián R. Wittwer1 \*, Acir M. Loredo-Souza2 , Mario E. De Bortoli1 and Jorge O. Marighetti1

1 Facultad de Ingeniería, Universidad Nacional del Nordeste (UNNE), Resistencia, Argentina

2 Laboratório de Aerodinâmica das Construções, Universidade Federal de Rio Grande do Sul (UFRGS), Porto Alegre, Brazil

\*Address all correspondence to: a\_wittwer@yahoo.es

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
