CFD ANALYSIS FOR WIND FLOW CHARACTERISTICS OF VARIOUS FACES IN AN H-SHAPED TALL BUILDING USING ANSYS CFX

Abstract

Tall buildings have been an intriguing concept to look at with a vast scope for improvement in the design capabilities against lateral wind and earthquake loads, and their behavior due to the same. The major load-resisting capacity to be analyzed and strengthened against high-rise structures is the Lateral Wind Load. This study investigates the accuracy of computational fluid dynamics (CFD) simulations for predicting the wind characteristics around a high-rise building of various façade. A 60m high H-shaped building with a span area of around 200 square meters scaled down to a ratio 1:100, modeled for isolated and interference conditions using ANSYS CFX and subjected to lateral wind loading at different incidents angles (0 to 360 degrees) between wind and windward face in Virtual Wind Tunnel. The results show the wind pressure experienced by the building is maximum at an incidence angle of 3 and negative wind pressure i.e. suction phenomenon is maximum at an incidence angle of 6 ; Variation of the wind pressure and average wind pressure using pressure contours and respective Coefficient of wind pressure due to lateral wind load on each façade is obtained using the Power Law Equation, are then calculated and mean variation along the faces Face-Average Cp has been calculated, plotted and discussed to a great extent.