External Pressure Coefficients on the Atypical High-Rise Building – Computing Simulation and Measurements in Wind Tunnel

Abstract

This paper deals with determination of the external pressure coefficients on the new planned high-rise building with atypical cross-section. The building will be built in the center of Bratislava (Slovakia). The real area surrounding of the designed building was also considered. The main aim of this research was to find out the accuracy of the results obtained by computing simulation. Two types of surfaces of the model were taken into account – smooth and rough ones. The real structure had the surface roughened by using a façade with windows and columns between them. As the reference values of external pressure coefficients were considered the results obtained from the experimental measurements carried out in the wind tunnel laboratory. Short description of the designed structure and its surroundings, wind tunnel laboratory, experimental measurements, scale model of the structure, and computing simulation with considered input parameters are mentioned here. The Computational Fluid Dynamics (CFD) simulation was performed using 3D Reynolds-averaged Navier-Stokes CFD with the SST k-ω turbulence model. At the end of the paper, obtained results are discussed and some recommendations for planning engineers are presented.