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Abstract
Fins, commonly termed as extended surfaces are used to increased rate of heat transfer from the surface of any engineering systems [1,2,4]. Cooling of a electronic component is very important to avoid overheating [3,5,6]. It has been stated that rate of heat transfer can be improved by performing perforations [5]. The convective heat transfer coefficient again depends on many factors like nature of the surface, fluid properties, temperature of a system, fluid velocity etc. Rate of heat transfer can be increased by increasing surface area of heat transfer [1, 2], by using fins of higher thermal conductivity material [1,2 ], increasing heat transfer coefficient between fins and surrounding fluid [1, 2]. From experimental studies it is found that rate of heat transfer can be improved by using perforated fins with increased in thermal efficiency in the range of 1 to 4% as compared to solid fins [3]. In current paper attempt is made to increased rate of heat transfer by proving fins with and without perforations in natural convection mode. Heat transfer rate with fins is compared with heat transfer rate without fins. And it is concluded that there is improvement in the rate of heat transfer because of perforations as compared to solid fins.