Paper Title
Numerical Study on Wind Pressure Characteristics of Cluster of Buildings in Ansys Fluent – A Case Study

Wind is air movement relative to the earth, driven by several different forces, especially pressure differences in the atmosphere. Therefore, the effects of different wind flow distribution to the cluster structures in an aspect of structural safety should be investigated. In modern cities, there are increasing numbers of high constructions and complex forms which can involve problems of significant wind discomfort around these buildings. In recent years, the numerical investigation has emerged as powerful and sufficient tool for building optimization and a better township planning. Present work proposes the methodology to carry out exterior numerical on a cluster of existing structures. Present work used a three dimensional scale down model of buildings where steady flow analysis has been done. It has been implemented through ANSYS Fluent 17.0 using SIMPLE algorithm as solver. The turbulence models used as the RANS based model: the standard k-epsilon model, RNG k-epsilon model and Realizable k- ɛ model. In this paper, the simulation results have predicted the ring vortex, roof separation bubble, side separation and wake recirculation, but the shapes and locations are different from each other. Wind pressure coefficients compared the three different turbulence models in Fluent. The maximum wind pressure coefficients was found to be at the middle of windward surface with height of about 0.7H-0.8H and the minimum wind pressure coefficient generates at the corner of the flow separation. Keywords- Computational Fluid Dynamics (CFD), RANS Equation, Cluster of Existing Structures, Wind Pressure Coefficients.