numerical insights into cross-sectional fin geometry for improved heat sink efficiency

The ongoing trend of downsizing electronic devices has led to increased heat generation per unit area, making effective heat dissipation essential to ensure device reliability and longevity. consequently, continuous advancements in cooling technology are being developed to meet these needs. mini channel heat sinks (mchs) have gained significant interest due to their high surface area-to-volume ratio. active and passive techniques have been applied to further improve the thermo-hydraulic performance of mchs. this study presents a numerical evaluation examining cross-sectional fin design modifications in mchs aimed at enhancing heat dissipation and thermal performance using single-phase fluid flow. initially, the analysis investigates the impact of different fin cross-sectional shapes—circular, triangular, square, and pentagonal—on heat sink performance. among these designs, the heat sink with square-shaped fins exhibited the best thermal performance. the second part of the study focuses on aspect ratios of 1.57, 1, and 0.57 specifically for the square-shaped fin model (including vertical, square, and horizontal rectangular configurations relative to inlet flow to the heat sink block). the square-shaped fin model achieved the most favorable temperature distribution compared to the vertical and horizontal rectangular models.