Abstract: Fins are useful way to increase heat transfer with minimal increase in volume. There is evidence suggesting that even dinosaurs used fins for heat transfer. Fins transfer heat either through free or forced convection. As the extended surface technology continues to grow,  new  design  ideas  emerge,  including fins made of anisotropic composites, porous media and perforated and interrupted plates. The requirements of lightweight fins and  economical,  so  the  optimization  of  fin  size  is  very  important   in fins design. Therefore, fins must be  designed  to  achieve maximum heat removal with  minimum material expenditure, taking into account,  however,  the ease of manufacturing of the fin shape. Large number  of  studies  has  been  conducted   on optimizing fin shapes. Other studies have introduced shape modifications by cutting some  material  from  fins to make cavities, holes, slots,  grooves  and  channels through the fin body to increase the heat transfer area and the heat transfer coefficient. The purpose of this study is to investigate the effects of lateral perforation shapes on the thermal performance of fins in comparison with the regular solid fins. Finding the best perforation shape among different types of perforations on fins. Lower inter-fin spacing ratio and comparatively lower Reynolds numbers are suggested for higher thermal performance. The major role maintained by Nusselt number and friction factor for enhancement of heat transfer through perforatedfins. 

Keywords: Heat Transfer, Perforated Fins, Nusselt Number, Friction Factor

| DOI: 10.17148/IARJSET.2019.6908