The impact of pin shape on the thermal performance characteristics of pin fin heat sink is assessed numerically and experimentally. Utilizing commercial ANSYS Fluent software, three-dimensional numerical simulations, based on the standard k-ε turbulence model with various parameters were studied on six different pin shapes: circular, elliptical, drop - shaped, square, hexagonal and triangular. In order to compare these various pin shapes, in all pin fin shapes hydraulic diameter the same. The pin fins were equidistantly arranged in a staggered manner. Six pin fin heat sink shapes were researched in turbulent forced-convection for Reynolds number 5165 to 41320 and heat flux 3000 to 24000 W/m2. To approve the numerical simulation and further supporting study for the effect of pin shapes, experiments were carried out for the same pin shapes with varying air velocities and heat fluxes. A good agreement was observed between numerical prediction and experimental data of heat transfer coefficient. From the results, it is indicated that the round pin fins provide a superior path for heat to transfer than sharp edges pin fins. Additionally, during the optimization process for pin fin numbers to be have varied, it is found that the Nf=46 can achieve the best heat sink performance. Upon comparison analysis of various shapes of pin fin heat sinks, the drop-shaped pin fin heat sink demonstrated the best thermal performance indicated lowest thermal resistance and heights Nusselt number.

The impact of pin shape on the thermal performance characteristics of pin fin heat sink is assessed numerically and experimentally. Utilizing commercial ANSYS Fluent software, three-dimensional numerical simulations, based on the standard k-ε turbulence model with various parameters were studied on ...