CFD study on heat transfer augmentation of rectangular shaped pinfin heatsink through the insertion of perforation and bulges

Abstract

Due to the rapid minimization of electronic gadgets, a significant amount of heat is generated in the electric parts and it becomes a serious concern. Hence, it is necessary to minimize heat to get better performance of the equipment. A numerical investigation is conducted to observe the effect of convective heat transfer enhancement for rectangular shaped pin fin heatsinks. Different shapes of holes in fins and different heights of bulges are added to create more surface area to reduce the excess heat for better performance. The addition of bulge is the novelty of the present work. Hence, a passive cooling technique and staggered arrangement of pin fin have been proposed for a better flow characteristic and heat transfer performance. To predict the turbulent flow parameters, working fluid is modeled using Navier-Stokes’s equations and RANS-based k-? turbulent model. The research is carried out utilizing CFD software (COMSOL Multiphysics 5.4) based on the FEM for turbulent flow region. The numerical results show that rectangular-shaped elliptical perforated with a bulge height of 4.5 mm pin fin heatsink, ensuring the highest hydro-thermal performance factor of 1.262 to 1.297 which shows the improvement of around 26% to 29% when compared to previous findings.