Al-Neama, AF, Khatir, Z, Kapur, N orcid.org/0000-0003-1041-8390 et al. (2 more authors) (2018) An experimental and numerical investigation of chevron fin structures in serpentine minichannel heat sinks. International Journal of Heat and Mass Transfer, 120. pp. 1213-1228. ISSN 0017-9310
Abstract
Water-cooled micro/minichannel heat sinks are an important component in managing the temperature of electronic components, particularly where high density of heat rejection is required. This study examines the potential to decrease the thermal resistance and enhance convective heat transfer of a serpentine heat exchanger, by introducing chevron fins which create secondary flow paths. This novel design is found to significantly reduce both the pressure drop across the heat exchanger and the total thermal resistance by up to 60% and 10%, respectively, and enhance the average Nusselt number by 15%. A three-dimensional conjugate heat transfer model is developed and validated against experimental measurements, before being used to carry out a parametric study involving the chevron oblique angle, secondary channel width and heat flux. The design of the serpentine minichannel with chevron fins is then optimised in terms of the minichannel width, minichannel number and chevron oblique angle. A 50 point Optimal Latin Hypercubes (OLHC) Design of Experiment (DoE) is constructed within the design variable space, using a permutation genetic algorithm, and accurate metamodels built using a Radial Basis Function (RBF) approach. A Pareto front is constructed which enables designers to explore appropriate compromises between designs with low pressure drop and those with low thermal resistance.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2017 Elsevier Ltd. All rights reserved. This is an author produced version of a paper published in International Journal of Heat and Mass Transfer. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Serpentine microchannel heat sink; conjugate heat transfer; chevron fins; CFD; direct liquid cooling; Multi-objective genetic algorithm |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Jan 2018 09:34 |
Last Modified: | 04 Jan 2019 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijheatmasstransfer.2017.12.092 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125443 |