Effect of the baffle on the performance of a micro pin fin heat sink

Abstract

In this research, a micro pin fin heat sink with a baffle where pure water flows through was simulated and analyzed in 3D by ANSYS Fluent in the laminar range of 50 ≤ Re ≤ 250. Here we tried to change the baffle’s type and dimensions for examining the effect of the baffle on the heat transfer. Baffles that used were single segmental baffle, double segmental baffle, and triple segmental baffle with four different overlaps namely 60%, 40%, 20%, and 0%. The results were compared with micro pin fin heat sink without baffle. The results show that using baffle in pin fins in all Reynolds number increases the heat transfer rate. However, by increasing the Reynolds number the pressure drop increases. The heat sink with 20% overlaps double segmental baffle has the highest heat transfer rate. The heat transfer rate in a 20% overlap and Reynolds number 250 is 47.37% higher than the heat sink without baffle. The increase in the mass flow rate has a great effect on the heat transfer rate.