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Parameter study of laminar flow and heat transfer in an interrupted microchannel heat sink with ribs

Wang, Wei LU ; Shuai, Yong ; Su, Wentao ; Li, Bingxi ; Tan, Yufei and Sundén, Bengt LU (2021) In Heat Transfer Research 52(2). p.13-27
Abstract

The enhanced heat transfer mechanism and parameter optimization of an interrupted microchannel heat sink with rectangular ribs (IMCHS-R) was numerically studied for Reynolds number ranging from 100 to 900, using ANSYS Fluent. Interrupted microchannel heat sinks with different kinds of rectangular ribs having different width, length, and locations were compared with a straight microchannel and microchannel interrupted chambers. The results indicated that the heat transfer and flow resistance were mainly strengthened at the sudden converging area and narrow channels, and the secondary flow area did not show a positive effect on heat transfer. The IMCHS-R with W2/W1 = 0.3 and L2/L1 = 0.7... (More)

The enhanced heat transfer mechanism and parameter optimization of an interrupted microchannel heat sink with rectangular ribs (IMCHS-R) was numerically studied for Reynolds number ranging from 100 to 900, using ANSYS Fluent. Interrupted microchannel heat sinks with different kinds of rectangular ribs having different width, length, and locations were compared with a straight microchannel and microchannel interrupted chambers. The results indicated that the heat transfer and flow resistance were mainly strengthened at the sudden converging area and narrow channels, and the secondary flow area did not show a positive effect on heat transfer. The IMCHS-R with W2/W1 = 0.3 and L2/L1 = 0.7 presented the best behavior from both PEC and Stot-ave at Re = 500–700. The heat transfer performance can be improved 2.0 times compared to the straight microchannel heat sink and the PEC can reach a value larger than 1.5. However, the rib location has a little effect on the enhanced heat transfer performances.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Entropy analysis, Interrupted microchannel heat sink, Numerical simulation, Overall heat transfer performance, Parameter study
in
Heat Transfer Research
volume
52
issue
2
pages
15 pages
publisher
Begell House
external identifiers
  • scopus:85101903034
ISSN
1064-2285
DOI
10.1615/HEATTRANSRES.2021036400
language
English
LU publication?
yes
id
000fda2f-3f72-40df-b4d3-89bddb1b8926
date added to LUP
2022-03-09 17:09:57
date last changed
2023-11-21 03:32:01
@article{000fda2f-3f72-40df-b4d3-89bddb1b8926,
  abstract     = {{<p>The enhanced heat transfer mechanism and parameter optimization of an interrupted microchannel heat sink with rectangular ribs (IMCHS-R) was numerically studied for Reynolds number ranging from 100 to 900, using ANSYS Fluent. Interrupted microchannel heat sinks with different kinds of rectangular ribs having different width, length, and locations were compared with a straight microchannel and microchannel interrupted chambers. The results indicated that the heat transfer and flow resistance were mainly strengthened at the sudden converging area and narrow channels, and the secondary flow area did not show a positive effect on heat transfer. The IMCHS-R with W<sub>2</sub>/W<sub>1</sub> = 0.3 and L<sub>2</sub>/L<sub>1</sub> = 0.7 presented the best behavior from both PEC and S<sub>tot-ave</sub> at Re = 500–700. The heat transfer performance can be improved 2.0 times compared to the straight microchannel heat sink and the PEC can reach a value larger than 1.5. However, the rib location has a little effect on the enhanced heat transfer performances.</p>}},
  author       = {{Wang, Wei and Shuai, Yong and Su, Wentao and Li, Bingxi and Tan, Yufei and Sundén, Bengt}},
  issn         = {{1064-2285}},
  keywords     = {{Entropy analysis; Interrupted microchannel heat sink; Numerical simulation; Overall heat transfer performance; Parameter study}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{13--27}},
  publisher    = {{Begell House}},
  series       = {{Heat Transfer Research}},
  title        = {{Parameter study of laminar flow and heat transfer in an interrupted microchannel heat sink with ribs}},
  url          = {{http://dx.doi.org/10.1615/HEATTRANSRES.2021036400}},
  doi          = {{10.1615/HEATTRANSRES.2021036400}},
  volume       = {{52}},
  year         = {{2021}},
}