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Analysis of laminar flow and heat transfer in an interrupted microchannel heat sink with different shaped ribs

Wang, Wei LU ; Li, Yongji ; Zhang, Yaning ; Li, Bingxi and Sundén, Bengt LU (2019) In Journal of Thermal Analysis and Calorimetry
Abstract

A numerical study was conducted to investigate the mechanism of laminar flow and heat transfer enhancement in an interrupted microchannel heat sink (IMCHS) with different shaped ribs at Reynolds number ranging from 100 to 900. The global flow features, heat transfer and friction for IMCHS with no ribs, rectangle ribs, triangle ribs and trapezoid ribs are detailed compared. The results show that the local heat transfer and friction performance of IMCHS with ribs show significant increase at the windward side of the ribs. Additionally, the smaller the chamfer of ribs, the larger average heat transfer and friction performance. For IMCHS with rectangle ribs, the maximum increment of Nu and f can reach to 1.81 and 2.59, respectively.... (More)

A numerical study was conducted to investigate the mechanism of laminar flow and heat transfer enhancement in an interrupted microchannel heat sink (IMCHS) with different shaped ribs at Reynolds number ranging from 100 to 900. The global flow features, heat transfer and friction for IMCHS with no ribs, rectangle ribs, triangle ribs and trapezoid ribs are detailed compared. The results show that the local heat transfer and friction performance of IMCHS with ribs show significant increase at the windward side of the ribs. Additionally, the smaller the chamfer of ribs, the larger average heat transfer and friction performance. For IMCHS with rectangle ribs, the maximum increment of Nu and f can reach to 1.81 and 2.59, respectively. Concerning the overall heat transfer performance (PEC), the trapezoid ribs show the best behavior with PEC = 1.65–1.38 at Re = 100–900.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Different rib shapes, Interrupted microchannel heat sink, Numerical simulation, Overall heat transfer performance
in
Journal of Thermal Analysis and Calorimetry
publisher
Akademiai Kiado
external identifiers
  • scopus:85076914584
ISSN
1388-6150
DOI
10.1007/s10973-019-09156-x
language
English
LU publication?
yes
id
1720b528-cb39-4370-995e-15493f8e66cd
date added to LUP
2020-01-09 14:38:56
date last changed
2020-01-21 12:52:16
@article{1720b528-cb39-4370-995e-15493f8e66cd,
  abstract     = {<p>A numerical study was conducted to investigate the mechanism of laminar flow and heat transfer enhancement in an interrupted microchannel heat sink (IMCHS) with different shaped ribs at Reynolds number ranging from 100 to 900. The global flow features, heat transfer and friction for IMCHS with no ribs, rectangle ribs, triangle ribs and trapezoid ribs are detailed compared. The results show that the local heat transfer and friction performance of IMCHS with ribs show significant increase at the windward side of the ribs. Additionally, the smaller the chamfer of ribs, the larger average heat transfer and friction performance. For IMCHS with rectangle ribs, the maximum increment of Nu and f can reach to 1.81 and 2.59, respectively. Concerning the overall heat transfer performance (PEC), the trapezoid ribs show the best behavior with PEC = 1.65–1.38 at Re = 100–900.</p>},
  author       = {Wang, Wei and Li, Yongji and Zhang, Yaning and Li, Bingxi and Sundén, Bengt},
  issn         = {1388-6150},
  language     = {eng},
  month        = {12},
  publisher    = {Akademiai Kiado},
  series       = {Journal of Thermal Analysis and Calorimetry},
  title        = {Analysis of laminar flow and heat transfer in an interrupted microchannel heat sink with different shaped ribs},
  url          = {http://dx.doi.org/10.1007/s10973-019-09156-x},
  doi          = {10.1007/s10973-019-09156-x},
  year         = {2019},
}