Comparison of aerodynamic coefficients of tall tapered triangular building modified with golden spiral in plan

Abstract

Better designs are mostly better geometries. Geometric shape modifications in buildings can greatly improve the aerodynamic performance as well as add to the aesthetics of the buildings. The present study involves a comparison of aerodynamic coefficients of a triangular building with slight changes in the plan. Force and pressure coefficients are compared among the buildings with tapering regular triangle in plan, tapering triangular plan modified with rounded corners, and tapering triangular plan modified with Golden spiral geometry in all possible wind attack directions. Numerical method was used with the help of ANSYS CFX and the k-epsilon turbulence model was used in this simulation. Pressure coefficients are compared locally and the problem of huge suction due to rounded corner modification can be reduced to a considerable extent by the Golden spiral geometry. The Drag coefficients are compared and the golden spiral has the least values in all possible directions of wind attack.