International Journal of Science, Engineering and TechnologyAuthors: Assistant Professor Ch.Indira Priyadarsini, V Sairam
Abstract: The objective of this study is to evaluate the thermal performance of various enhanced fin configurations under steady-state forced convection, using air as the working fluid. Numerical simulations were performed for Reynolds numbers up to 19,945.4, with a constant heat flux boundary condition applied at the heat sink base. The fin geometries analyzed include conventional cylindrical fins, straight HPPF (high-performance pin fins), 30° twisted HPPF. The simulations were carried out in ANSYS Fluent using the realizable k–ε turbulence model. Mesh independence and model validation were confirmed using benchmark data from the literature. Temperature contour analysis indicated that cylindrical fins exhibited limited thermal gradients and retained higher base temperatures due to insufficient airflow disruption and surface interaction. In contrast, the straight and twisted HPPFs demonstrated superior heat dissipation, with the 55° twisted perforated HPPF showing the highest thermal performance by maintaining the lowest base and tip temperatures.
DOI: http://doi.org/ijset.vol.13.issue3.204
