Abstract In this study, the thermal-hydraulic performance of four finned heat sink models, namely square, cylindrical, conical, and pyramidal fins, was numerically investigated. The main objective of this work is to evaluate and compare the thermal performance of these fin geometries under identical operating conditions. Numerical analysis was conducted using the ANSYS Fluent solver, where the governing energy and Navier–Stokes equations were solved in conjunction with the k-ɛ turbulence model. The simulations were performed for Reynolds numbers ranging from 5,000 to 25,000, under a uniform heat flux condition of 5000 W/m 2 . The ideal fin spacing and length for the square fins were tested and applied as reference parameters for all fin geometries. The results indicated that cylindrical fins exhibit the best thermal performance, achieving the lowest heated wall temperature and the highest Nusselt number compared with other models. Unlike previous studies focusing on single fin geometries, this study provides a comparative assessment of multiple fin shapes, offering clearer insights into thermal-hydraulic performance and guidance for future research.
Nada et al. (Fri,) studied this question.