alexa Simulation of Airflow and Wind Pressure Coefficient in a Naturally Ventilated Classroom Model Using Environmental Wind Tunnel and CFD Modelling

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Simulation of Airflow and Wind Pressure Coefficient in a Naturally Ventilated Classroom Model Using Environmental Wind Tunnel and CFD Modelling

Urban areas are increasingly becoming polluted with increase in the number of industries, vehicles along with factors like reduction in forested areas to make way for various activities. This makes indoor spaces in urban areas prone to pollutants from outside which is compounded by factors like defects and leakage in buildings as well as climatic conditions which may transfer the pollutants from outside to the interiors. Natural ventilation in buildings can create a comfortable and healthy indoor environment. It replaces indoor polluted air with fresh outdoor air without using mechanical power and thus save the energy consumed by the heating, ventilating and air-conditioning systems in a building if it provides acceptable indoor air quality (IAQ) and thermal comfort levels. In a naturally ventilated building, air is driven in and out due to pressure difference produced by wind or buoyancy forces. Though natural ventilation is conceptually simple, its detailed design as the ventilation performance can be a challenge as intake air is not usually controlled and it involves the influence of building’s type, its surroundings and climate. It is even more difficult in cases of wind driven ventilation, where effects of turbulence dominate.

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