Comparison of wind flow effect for varying cross – sectional height of tall building using ANSYS

Abstract

Study of wind is empirical for the designing of tall structures because it considers the instability due to slender behavior of these structures. In this study, three models namely A, B, and C are analyzed on ANSYS using Computational fluid dynamics approach. These three models have a total height of 192 m built of two types of cross – sections as plus and square (below plus). These models differ by the heights of the cross sections only. Plus and square cross – section heights for Model A are 96 m each, for Model B are 48 m and 144 m respectively and for Model C are 144 m and 48 m respectively. CFD simulations are performed for wind of magnitude 10 m/s when incident on these three modes at wind incidence angle 0° and the results are interpreted in terms of pressure contours and streamlines. It is observed that designing for critical faces is a must. Also from streamlines it may be observed that as the cross – sectional height of irregular shape increase, more stability is noticed. It is also observed that the wind velocity increases at the top most points of the models.