Finite Element Analysis of Convective Heat Transfer Augmentation from Rectangular Fin by Circular Perforation

Abstract

It is very important to dissipate unwanted heat generated in mechanical devices such as IC engines, radiators, electronic IC?s etc. to the atmosphere. Extended surfaces are widely use in many engineering application because of easy in construction, require less space, light weight. This study examines heat transfer augmentation from a rectangular fin embedded with circular perforation under natural convection compared to the equivalent solid (none perforated) fin using ANSYS 10. Fins with different diameters of hole and number of perforation keeping length constant are examined. The parameters considered were geometrical dimension and thermal properties of fin such as material properties, convective heat transfer coefficient. Study showed that as perforations increases heat transfer rate also increases up to certain dimension and then starts decreasing. Heat transfer enhancement of the perforated fin increases with increase in diameter of perforation and number of perforation.