Investigation of Concrete Chimney Structure Using Edge Treatment Technique Based on CFD Static Structural Analysis

Abstract

AbstractThe chimneys are used in various types of manufacturing units and plants like power plants, chemical plants, etc. The chimney structures are continuously exposed to wind gusts which may cause damage due to lateral deformation and high base shear. The objective of the current research is to investigate the effect of aerodynamic forces on the lateral deformation of buildings. The use of edge treatment technique for drag reduction of the building structure is then investigated for the concrete chimney to reduce drag force and lateral deformation. The edge treatment technique used in the analysis is filleted type. The comparison is made between generic chimney design and filleted chimney design based on CFD and static structural analysis results. The modeling and both simulations are conducted in ANSYS software. The research findings have shown that edge treatment on chimney structures can be an effective technique in reducing drag force, base shear, and deformation-induced on it. From the CFD results, we can conclude that the design profile of the chimney has a significant effect on the pressure exerted by air. The pressure exerted on the generic chimney (without edge treatment) has a higher magnitude as compared to filleted chimney design which caused higher lateral deformation. The use of filleted design aided to reduce drag force on chimneys by 39.7% and lateral deformation by 69.1%.KeywordsChimneyFEACFDDrag forcePressure