Investigation of Inner and Outer Flow Field Characteristics of Pyramidal Roof Rectangular Base Building Due to Synoptic Wind Flow Through it by Changing the Width and Height of Openings of Outlet Having Same Area of Both Inlet and Outlet Opening

Abstract

A key component of building design involves understanding the flow field that develops near a building due to synoptic wind flow across it. The wind environment around buildings is important for their structural strength, but it also has an impact on ventilation effectiveness, pedestrian comfort, and the spread of pollutants. Modern structures now have a variety of apertures, including windows, doors, and ventilators, leading to the rise of the green building idea and environmentally friendly living. The flow field becomes more complex as a result of these apertures, which alter the flow properties inside and outside the building. The goal of the current study is to better understand the flow fields surrounding the structures with openings, both internally and externally. This study aims to examine the wind flow over structures with Pyramidal roof rectangular base building that have openings exposed to synoptic winds. Using the Computational Fluid Dynamics (CFD) approach, internal flow within the buildings is also examined for optimal ventilation. Numerical simulations are conducted using ANSYS-FLUENT, a commercially available CFD program. The steady Reynolds Averaged Navier Stokes (RANS) equations are solved by numerical simulations.  This study examines the internal pressure distribution and air flow rate which are greatly influenced by the height and width of leeward opening while keeping wall porosity of windward and leeward wall constant. The study provides information about the flow environment within and outside of a low-rise building with Pyramidal roof rectangular base building with openings, which is useful for estimating wind loads for the building's structural design and for creating a natural ventilation system.