Evaluation of Turbulence Models and Wind Flow Behaviors around the Building

Abstract

Wind loads are of important, particularly in the design of large structures. The wind velocity that should be considered in the design of structure depends upon the geological location and the exposure of the structure. Wind is a phenomenon of great complexity because of the many flow situations arising from the interaction of wind with structures. Wind conditions and wind flow patterns are strongly influenced by high-rise buildings and urban environment around buildings because of the many flow situations arising from the interaction of wind with structures. CFD (Computational Fluid Dynamics) simulation is the main research method for assessing the wind environment around building complexes. In this paper, a comparison of different turbulence models in simulating wind environment around building complexes is conducted to discuss their precision of simulation. Present work used a three dimensional scale down model of buildings where transient flow analysis has been done. It has been implemented through ANSYS Fluent 17.0 using SIMPLE algorithm as solver. In the present study a single high-rise building is considered and evaluated for three different turbulence models by using CFD simulation and is compared with the experimental results obtained from Tokyo Polytechnic University "New frontier of Education and Research in Wind Engineering" to validate CFD simulations. The existing cluster of building located in Mandalay is selected. Simulation observed that the layout of existing cluster of buildings is good enough for building planners to take critical decision such as exterior layout of building,
building spacing by wind flow pattern except for 45˚ wind angle. Before the initial stages of the building design, the layout of the buildings over the neighborhood is an important factor to control the wind field for urban planner.