CFD simulations of flow around octagonal shaped structures

Abstract

The race for the construction of super-tall structures is the new trend in this era. Construction of super-tall structures is mainly governed by wind and its associated effects on these large slender structures. Hence proper knowledge about the aerodynamic effects of wind and the response of the structure to these effects is highly important. This knowledge helps in arriving at the shape of the building, the structural system to be adopted and also the method of construction to be adopted. Recent advancements in Computational Fluid Dynamics (CFD) helps in predicting the flow of the wind around the structure, the velocity and pressure distributions, lift and drag co-efficient, the formation of vortices and many such parameters that govern the structural stability of the structure. This project studies about the aerodynamic force coefficients on an octagonal building for various angles of attack and are compared with the results obtained from wind tunnel experiments and also studied about the response of the building due to vortex induced forces and moments.