Computational Fluid Dynamics Modeling Study for the Thermal Performance of the Pin Fins Under Different Parameters

Abstract

Abstract Computational Fluid Dynamics CFD modeling study was carried out to investigate the effect of the pin fins arrangements over the flat plate heat sink. The pin fins were adopted with in-line array form over the surface of the heat sink with different parameters. The CFD domain was designed by the use of ANSYS FLUENT 2019 R1 commercial software. The Reynolds Average Naiver Stoke RANS turbulent model was used in this study to show accurately capture the effect of alternating acceleration and deceleration and consequent variations in the pressure field. The heat sink is in a rectangular shape with a rib length of 100mm and100mm. This CFD investigation included a simulation of the proposed heat sink under the forced convection with Reynolds number range of 2166.67 ∼ 19500 and subjected heat flux of 1000W/m2. Pin fins diameters range were 3, 6 and 9mm while the fin lengths range were 5, 10 and 15mm under the same the heat flux and Reynolds number. The predicted results showed an augmentation in the Nusslte number values of the finned heat sink as compared to the flat one. Moreover, this enhancement was associated with the increase of the applied Reynolds number. It was found that the best thermal performance of the heat sink was conducted for the fin length of 15mm and fin diameter of 9mm.