Al-Asadi, MTK and Wilson, M orcid.org/0000-0002-1058-2003 (2018) Evaluation of nanofluid performance with vortex generators for enhanced micro-channel heat transfer. In: Proceedings of International Conference on Thermal Engineering: Theory and Application. The Eleventh International Conference on Thermal Engineering: Theory and Applications, 25-28 Feb 2018, Doha, Qatar.
Abstract
This study explores the influence of nanofluids using various micro-channel geometries on conjugate heat transfer. The nanofluids used here, are SiO2 and Al2O3 nanoparticles with different concentrations up to 4% in water as a base fluid under laminar flow. A new design of a uniform micro-channel is considered, having different shapes of vortex generators (VGs) positioned at intervals along the base of the channel. After validation against previous micro-channel studies, numerical simulations with COMSOL Multiphysics® V5.2a are used to compare VGs having circular and elliptical cross-sections and fixed volume at Reynolds number 50-1000 with a uniform heat flux. The VGs are shown to offer significant potential in combatting the challenges of heat transfer in the technological drive toward lower weight/smaller volume electrical and electronic devices. The results show that non-dimensional factors (Re) can mislead the evaluation of heat transfer using nanofluid because Re is a function of the concentration and thermal properties, i. e. thermal conductivity, viscosity and density compared to the physical units such as the velocity.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Nanofluids evaluation; micro-channel heat sink; SiO2 and Al2O3-water nanofluids; vortex generators |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Mar 2018 11:23 |
Last Modified: | 30 Jun 2020 14:48 |
Published Version: | http://www.ictea.ca/index.html |
Status: | Published |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:128481 |