Processes modelling in two-nave building with natural air exchange

The paper explains ventilation air exchange driven by the gravitational force and wind, and the major factors affecting the phenomenon. A mathematical model, namely a system of equations, for computations of natural ventilation in two-bay building is presented. The model was used to make calculations of the amount of ventilation air and the pressure inside the building. The effect of external temperature and wind velocity on the amount of ventilation air and pressure values inside the building was analysed. Aerodynamics of multi-zone building ventilation is a complex process. It is difficult to both to determine the pressure prevailing inside the building and to select the area of ventilation openings. The literature does not provide dependences for making computations for such buildings, while computer methods are too time-consuming.