Estudo dos efeitos do escoamento atmosférico sobre edifícios altos mediante uso de dinâmica dos fluidos computacional

Abstract

This work presents a computational fluid dynamics study to evaluate the neighboring effects on tall buildings. To evaluate such effects, it was used the RANS approach to solve the CFD equations, modelling the turbulence using the two equations model 𝑘 − 𝜀. It was simulated two different configurations of buildings, the first model was the isolated standard testing building, the second model had a configuration of the standard testing building and a selected neighborhood. Both models were analyzed for three different angles of attack of the wind. 0°, 45° and 90°. The numeric results were collected as pressure coefficients, force coefficients and neighboring factor. The numerical results were then compared to experimental data. The simulated model’s data turned out to be more consistent with the experimental data when the wind direction was perpendicular to the analyzed faced. The simulated neighboring factors and its experimental counterparts were compatible. In this study is also noted that the Brazilian standards for wind calculations, specially within the neighboring factor chapter are not compatible with the experimental or analytical studies, therefore, it is concluded that the standards need a revision to continue to be relevant.