Optimization of micro pin-fin heat sink with staggered arrangement

Abstract

The effect of the pin-fin shapes on the overall performance of the carbon nanotube bundles as porous micro pin-fins with in-line and staggered arrangement for the heat transfer and pressure drop is studied using FLUENT 15.0. The results of the study revealed that at 100 < Re < 2000, triangle has the best performance followed by square, rectangle, hexagon and circle in 1 mm height, 15 mm width, and 45 mm length silicon rectangular mini-channel. The staggered configuration gave better heat transfer performance than in-line arrangement at all Reynolds numbers for all shapes with up to 19% thermal improvement but with up to 79% pressure drop differential. On a mini-channel surface with nanotube fins, the nanofluid (0.001 to 1%) increases the thermal performance up to 40% in comparison with water. The best thermal performance enhancement of 106% was obtained by using staggered triangular fins with larger fin height of 0.75 mm, smaller fin width of 0.5 mm, and spacing double the fin width and 0.01% CuO-water nanofluid followed by 103% with 0.01% Al 2 O 3-water in comparison to channels with inline circular fins and water.

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

“…The nanofluids have also been used to enhance the heat transfer rate by increasing the thermal conductivities of the base fluid using suspended nanoparticles. Arjun and Kumar [11] performed numerical study to optimize the pin fin heat sink using water and CNT. Kumar et al [12] reviewed progression in theoretical modelling of the nanofluids.…”

Effect of Pin Diameter Degressive Gradient on Heat Transfer in a Microreactor with Non-Uniform Pin-Fin Array under Low Reynolds Number Conditions

“…Two correlations were established considering the clearance. To study the effect of the pin shape, Tullius et al [35] and Arjun et al [36] studied the heat transfer characteristics of pin-fin arrays with various pin shapes via numerical simulation. The conclusions revealed the significant effect of pin shape on heat transfer.…”

Numerical simulation and circuit network modelling of flow distributions in 2-D array configurations

“…Packing configurations are common elements which are widely used in real applications such as chemical packed bed reactor [1], chromatographic separation [2], and heat sinks [3]. Yang et al [1] revealed that structured packed beds have different flow and heat transfer characteristics compared with randomly packed beds.…”

“…Li et al [2] found different packing structures such as simple cubic packing, body-centered cubic packing, and face-centered cubic packing may lead to various flow patterns and mass transfer performances in chromatography separation. The pressure drop and cooling performance of heat sinks with different shaped pin-fin structures arranged in staggered and in-line order were studied by Arjun and Kumar [3]. Sayehvand et al [4] studied the forced convective heat transfer over three cylinders in staggered arrangement.…”