Thermal management of mini channel slotted fin heat sink using TiO2-H2O blend of anatase and rutile nanoparticles: experimental and numerical study

Abstract

ABSTRACT High processing demand has started high heat generation problems inside compact electronic components. In this work, firstly the thermal performance was investigated experimentally for the mini channel having slots on straight rectangular fin heat sink. Slots were made which reinitialize the thermal boundary layer at each slot position. This effect makes the flow again in a developing state and helps in a better mixing of the flow inside the channel due to the presence of vortexes because of slots, which overall results in better heat transfer. The thermal performance of the slotted fin heat sink was compared to the straight rectangular fin heat sink. Secondly, TiO2-pure water (0.005% and 0.01%) which was the blend of Anatase and Rutile crystalline-shaped nanoparticles were used both numerically and experimentally. The base temperature was reduced 8.2% using pure water at 1LPM when compared with the straight rectangular fin heat sink reported in the literature. The lowest base temperature recorded for the slotted fin heat sink was found to be 40.25°C using TiO2-pure water (0.01%) nanofluids at 1 LPM. The reduction in base temperature observed for TiO2 -H2O (0.005%) and TiO2-pure water (0.01%) was 8.8% and 11%, respectively, as compared to pure water. Experimental results were numerically validated with good agreement.