Performance Evaluation of Rectangular Fin Array-A Comparative Study of Fin with Various Perforated Designs

Heat transfer from the heat sink plays major role on the performance on various components in Automobile, Air conditioning, Heat treatment, Electronic Industries. In this heat transfer process, material type, shape, length plays a vital role. It is very important to dissipate unwanted heat generated in devices such as IC engines, radiators, electronic IC’s etc. to the atmosphere. Extended surfaces are widely used for this purpose in many engineering applications because of easy construction, requires 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 fin using Computational Fluid Dynamics analysis on the rectangular fin arrays by natural convection heat transfer process. Parameters varied in this work are space length and thickness of fins. Circular, Elliptical and Rectangular fins are compared for better heat transfer rate. The output parameters like Nusselt number, Reynolds number, Heat Transfer rate are increased indicating better cooling for the modified fin with low aspect ratio. These output parameters are increased with the perforations on the fin also maximum heat transfer rate is observed for circular fin. However the heat transfer coefficient is found to be Maximum for original model because of low temperature differences due to slow cooling.