Thermal Analysis on Pin-Fins With Hexagonal & Threaded Geometry In Natural and Forced Convection

In the present work of heat transfer for hexagonal fins (1mm & 2mm) grooves on surface and threaded fin isaddressed. The test has been performed on three different fin geometries having hexagonal (1mm)groove,hexagonal(2mm)groove, threaded fin(0.5mm)pitch and test performed by using a centrifugal blower, test section, heater andtest panel and Results are obtained for temperature distribution, effectiveness, efficiencies at a same flow rate of air as it wasconducted in forced convection and the same parameters considered for different values are obtained for natural convectionwith different fins as well. In this experiment for forced convection, the airflow rate is constant i.e, 2.3371 m/sec throughoutthe experiment. In natural convection, efficiency for the threaded fin is high with 93.89% and effectiveness ofhexagonal(2mm)depth fin is 28.11. In forced convection, the efficiency of the threaded fin is high with 81.83% andeffectiveness of hexagonal(1mm)depth fin is high with 23.51 was recorded. The heat transfer rate is higher in naturalconvection is hexagonal(2mm)depth fin with 11.41 watts and 21.75 watts in forced convection with hexagonal(1mm)depthfin