Investigation of Inner and Outer Flow Field Characteristics of Pyramidal Roof Rectangular Base Building Due to Synoptic Wind Flow through it by Changing the Wall Porosity of the Building.

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 effects of various wall porosities on the building façade as well as the relative vertical placements of the openings. The flow field both within and outside of buildings is significantly impacted by wall porosities and the relative vertical positions of openings on building facades. The internal pressure distribution and air flow rate are greatly influenced by the wall porosity. 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.