In this investigation, the augmentation of heat transfer from a rectangular fin subjected to free convection provided with longitudinal hexagonal perforations is considered using 1D finite element technique. The fin with longitudinal hexagonal perforations is compared with its equivalent solid one. The perforated fin variables considered are geometrical measurements and thermal properties of the fin and that of the perforations. This study involves enhanced heat transfer surfaces that produce increased turbulence and a better flow distribution. Also, it is considered the gain in fin area and of heat transfer coefficients due to perforations. The study pointed out that in a certain range of longitudinal hexagonal dimension and spaces between perforations, there is an augmentation in heat losses over that of the equivalent solid fin. Moreover, the heat transfer losses of the perforated fin rise as the fin thickness and thermal conductivity are increased.

finite element, perforated fin, hexagonal perforation, heat dissipation, heat transfer augmentation, natural convection.