Effects of Geometrical Shape of Roofs on Natural Convection for Winter Conditions

In the practical applications, roofs of buildings can be in different shapes depending on architectural design of building or climate. Some of these building roofs can be classified as gambrel, saltbox and gable roofs. In the present study, we investigated the natural convection heat transfer and fluid flow inside the gambrel, gable and saltbox roofs for winter boundary conditions. With this aim, the identified roofs are compared with each other from the heat transfer and flow field point of view. Effects of Rayleigh number also tested in each type. Results are presented with streamlines, isotherms, local and mean Nusselt numbers. It is aimed that this study will help for designer to show more efficient ways of saving energy