Turbulent heat transfer and nanofluid flow in a triangular duct with vortex generators

Ahmed, Hamdi E. and Yusoff, M.Z. and Hawlader, Mohammad Nurul Alam and Ahmed, Mirghani Ishaq and Salman, B. H. and Kerbeet, A. Sh (2017) Turbulent heat transfer and nanofluid flow in a triangular duct with vortex generators. International Journal of Heat and Mass Transfer, 105. pp. 495-504. ISSN 0017-9310

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Abstract

Triangular conduits provide low pressure drop and low heat transfer coefficient compared to circular and other shapes of non-circular passages. The advantage of their low pressure drop motivated this research to increase the heat transfer rate by using two passive methods; vortex generators and nanofluids. Turbulent flow-forced convective heat transfer of Al2O3/water and CuO/water nanofluids in an equilateral triangular passage with a delta-winglet pair of vortex generator is numerically studied in three-dimensions. A two-phase mixture model is utilized to simulate the fluid flow considering variable properties for nanofluids whereas those of solid nanoparticles are constant. The study is carried out to examine the effect of the different types of nanofluids, different volume fractions with a wide range of Reynolds numbers on the heat transfer and pressure drop penalty. A comparison between the nanofluid and the base fluid heat transfer is performed in this research. The Al2O3/water nanofluid shows great enhancement in heat transfer with the maximum overall performance of 45.7% at 3 vol.% and Re = 16,000 compared to the base fluid. High heat transfer and low pressure drop are observed by using nanofluid and VG simultaneously.

Item Type:	Article (Journal)
Additional Information:	6548/57319
Uncontrolled Keywords:	Nanofluids; Turbulent flow; Two-phase mixture model; Variable properties; Vortex generator
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof Mohammad Nurul Alam / M N A Hawlader
Date Deposited:	19 Jun 2017 09:29
Last Modified:	18 Jul 2017 08:49
URI:	http://irep.iium.edu.my/id/eprint/57319

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