Effect of channel angle of pin-fin heat sink on heat transfer performance using water based graphene nanoplatelets nanofluids. (March 2017)

• Record Type: Journal Article
• Authors: Ali, Hafiz Muhammad; Arshad, Waqas
• Is Part Of: International journal of heat and mass transfer. Volume 106(2017:Mar.)
• Page Start: 465
• Page End: 472
• Publication Date: 2017-03
• Subjects: Minichannel -- Graphene nanoplatelets -- Convective heat transfer coefficient -- Electronics cooling -- Angle of channel; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2016.08.061
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: Effect of channel angle on thermal performance of pin fin heat sink is reported. Water based graphene nanoplatelets (GNPs) nanofluids are used as test fluid. HTC for 22.5 degree heat sink is 84.30% higher as compared 90 degree heat sink. Nanofluids compared to distilled water showed about 20% heat transfer enhancement. Abstract: This study reports an experimental work to examine the angle effect of pin fin heat sink channel in terms of convective heat transfer coefficient, log mean temperature difference and thermal resistance using water based graphene nanoplatelets (GNPs) nanofluids in a flow rate range of 0.25–0.75 LPM. Three heat sinks having channel angles, measured from positive x -axis, 22.5 degree, 45 degree and 90 degree are used. The volumetric concentration of GNPs particles is 9.5% and these particles consist of overlapped two-dimensional graphene layers. All heat sinks are fabricated with copper substrate, which is maintained at uniform heat flux during experimentation. Heat sink with 22.5 degree channel angle shows better thermal performance as compared to other tested heat sinks. For the same flow rate, 22.5 degree heat sink shows lowest convective thermal resistance as compared to other tested heat sinks.