Experimental Investigation of Heat Transfer by Varying Inner Diameter of Circular Hollow Pin Fin

Heat transfer enhancement over surface results from the pin fin forming circular recesses. Heat Transfer enhancement using hollow pin fin. The aim of the present study is to improve the heat transfer characteristics and to investigate the performance of fin efficiency by using fins of different size hollow circular pin fin. Here the system follows natural convection as the mode of heat transfer and it is the principle used in it. This experiment accomplished by using brass circular pin fin, which connects to the thermocouple. From the heater the pin fin gets heated and the surrounding air convicted out it from the surface of the pin fin. This procedure followed for the fin of different inner diameter of size of hollow diameter. This paper studies the temperature variation along the fin length for the various inner diameters of hollow pin fin, under the natural convection.