Utilisation des méthodes CFD pour simuler le phénomène de la ventilation naturelle dans les locaux.

Abstract

The techniques of natural ventilation count among the best solutions, which are used to ensure the thermal comfort of occupants as well as to reduce the energy bill. This thesis aims to evaluate the use of crossing natural ventilation and one-sided ventilation in order to predict the best adapted technique. Another objective of this thesis is the study the heat transfert in a vertical channel asymmetrically heated in order to study the influence of inclination of the not heated wall on natural convection and predict the ideal angle for a better energy efficiency. The results of this work has proved that the technique of cross ventilation is undoubtedly the best solution in order to avoid all causes that degrade building quality and promote the comfort of occupants. It has also been prove that the inclination of -10° (of the non-heated wall) seemed with being the optimal angle ensuring greatest energy efficiency.