COMPUTATIONAL INVESTIGATION AND OPTIMIZATION OF HEAT TRANSFER ENHANCEMENT THROUGH PERFORATED PIN FINS OF DIFFERENT DIMENSIONS
Fins are used for heat transfer enhancement and fabricating perforations in fins causes improvement of heat transfer. The surface area and heat dissipation rate of perforated fins increase within a given range of perforation dimension as well as perforated fin has lower pressure drag. The present work calculates heat transfer enhancement of staggered circular pin fins of different geometries with increasing number and size of perforations. Three dimensional CFD simulations have been carried out to investigate the effects of fin size and dimensions and numbers of perforations for enhancement of heat transfer rate against pressure loss. Results showed that the heat dissipation rate of perforated fins up to certain perforation number and size are always higher than the solid ones and with the variation in fin size, heat transfer rate also improves significantly up to a specific dimension of fin. On the other hand pressure drop through heat sink decreases with the increment of number as well as size of perforations. Moreover, variation of pressure drop of perforated fin is also influenced by size of the fin. Multi Criteria Decision Making optimization method like MOORA has been applied to select the best heat sink configuration.