| This thesis focuses on modeling of thermal movements and air quality inside buildings using the Euler equations. The main objective is to compare the numerical results obtained with the Euler model (inviscid model) to a model based on Navier-Stokes equations (viscous model) for different scenarios of heating, ventilation and air conditioning. To achieve this aim, this study is divided into three parts. The first part presents the results of a two-dimensional study which contains two scenarios: heating by natural convection and ventilation by the floor. The second part of the thesis is a three-dimensional study for evaluation of flow velocities, temperatures and thermal comfort indices PMV (Predicted Mean Vote) and PPD (Percentage of Dissatisfied Persons) for two cases of simulation: heating and ventilation by the floor and an air conditioning case. Numerical results from the two previously described parts of this thesis were compared to experimental measurements; performed in a model room situated at the center of thermal technology (CTT) at the Ecole de technologie superieure (ETS). The last part of the present thesis is dedicated, first, to study the dispersion of a contaminant gas (SF6) in a ventilated room using two ventilation strategies. Finally, the Euler model's ability to determine the field velocity, temperature and local concentration of a contaminant gases is verified through a simple multizone modeling. |
