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Numerical investigation of various twisted tapes enhancing a circular microchannel heat sink performance

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journal contribution
posted on 17.11.2022, 14:48 authored by Abdullah Masoud Ali, Aldo Rona, Matteo Angelino

The continuous power increase and miniaturization of modern electronics require increasingly effective thermal management systems. The thermo-hydraulic performance of water-cooled L×L square-base silicon microchannel heat sinks is investigated by a conjugate heat transfer and computational fluid dynamics model over the Reynolds number range 100 to 500. Water at a constant inlet temperature of 298 K runs through 33 parallel tubes, extracting heat from the bottom wall that has a 100 W/cm2 constant heat flux input. Hydro-thermal performance-enhancing tape inserts are numerically tested featuring (i) radial gaps between the tape and the tube, (ii) tape twist with axial pitch distances of ∞, L/2, or L/4, (iii) zero, one, or two 90-degree angular steps between consecutive tape segments, (iv) alternating clockwise and anti-clockwise consecutive twisted tape segments, and combinations of these features. The radial gaps produce both a hydraulic and a thermal performance loss. All combinations of tape twist, angular steps, and twist direction reversal produced better thermal performance gains to hydraulic loss trade-offs than the baseline microchannel configuration with no tape. The microchannel heat sinks with four L/4 alternating pitch consecutive helical tape segments provided the lowest bottom wall average temperature, 16.13 K below that with not tape, at the same Reynolds number of 500. This predicted temperature drop is a significant achievement towards conditioning electronic components so they may be longer-lasting, use less energy, and have a reduced environmental impact.

Funding

Proposal for a Tier 2 Centre - HPC Midlands Plus

Engineering and Physical Sciences Research Council

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Sulis: An EPSRC platform for ensemble computing delivered by HPC Midlands+

Engineering and Physical Sciences Research Council

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Ali’s PhD is supported by the Libyan Ministry of Higher Education and Scientific Research

Graphics rendering software was originally purchased under EPSRC GR/N23745/01

ALICE High Performance Computing Facility at the University of Leicester

History

Author affiliation

School of Engineering, University of Leicester

Version

VoR (Version of Record)

Published in

International Journal of Heat and Fluid Flow

Volume

98

Publisher

Elsevier BV

issn

0142-727X

Copyright date

2022

Available date

17/11/2022

Language

en

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