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Analysis of micro-channel heat sinks with rectangular-shaped flow obstructions

Xie, Gongnan; Li, Yanlong; Zhang, Fengli and Sundén, Bengt LU (2016) In Numerical Heat Transfer Part A: Applications 69(4). p.335-351
Abstract
It is recognized that cooling methods incorporating micro-channel heat sinks with high capacities of heat removal are necessary for cooling of electronic devices. In this paper, based on a water-cooled smooth micro-channel heat sink, a series of rectangular-shaped flow obstructions are designed into a heat sink, and then the corresponding laminar flow and heat transfer have been analyzed numerically by computational fluid dynamics. Five different configurations of the flow obstructions are considered by adjusting the length of the flow obstructions. The influence of the length of the flow obstructions on heat transfer, pressure drop, and thermal resistance is also observed and compared to that of the traditional smooth micro-channel heat... (More)
It is recognized that cooling methods incorporating micro-channel heat sinks with high capacities of heat removal are necessary for cooling of electronic devices. In this paper, based on a water-cooled smooth micro-channel heat sink, a series of rectangular-shaped flow obstructions are designed into a heat sink, and then the corresponding laminar flow and heat transfer have been analyzed numerically by computational fluid dynamics. Five different configurations of the flow obstructions are considered by adjusting the length of the flow obstructions. The influence of the length of the flow obstructions on heat transfer, pressure drop, and thermal resistance is also observed and compared to that of the traditional smooth micro-channel heat sink without flow obstructions. The overall resistance versus inlet Reynolds number and pumping power are also compared for whole micro-channel heat sinks (including smooth micro-channel heat sink). The results show that the capacity of heat removal of micro-channel heat sinks with flow obstructions is much better than that of the corresponding straight micro-channel heat sink. It is found that the length of the flow obstructions has a major influence on thermal performance. In other words, the flow obstructions placed in the micro-channel heat sink can improve thermal performance. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer Part A: Applications
volume
69
issue
4
pages
335 - 351
publisher
Taylor & Francis
external identifiers
  • wos:000367552100001
  • scopus:84953358281
ISSN
1040-7782
DOI
10.1080/10407782.2015.1080580
language
English
LU publication?
yes
id
7e671eb7-2992-48ac-9b77-47740b58f3b9 (old id 8761618)
date added to LUP
2016-02-22 13:18:35
date last changed
2017-09-17 06:51:00
@article{7e671eb7-2992-48ac-9b77-47740b58f3b9,
  abstract     = {It is recognized that cooling methods incorporating micro-channel heat sinks with high capacities of heat removal are necessary for cooling of electronic devices. In this paper, based on a water-cooled smooth micro-channel heat sink, a series of rectangular-shaped flow obstructions are designed into a heat sink, and then the corresponding laminar flow and heat transfer have been analyzed numerically by computational fluid dynamics. Five different configurations of the flow obstructions are considered by adjusting the length of the flow obstructions. The influence of the length of the flow obstructions on heat transfer, pressure drop, and thermal resistance is also observed and compared to that of the traditional smooth micro-channel heat sink without flow obstructions. The overall resistance versus inlet Reynolds number and pumping power are also compared for whole micro-channel heat sinks (including smooth micro-channel heat sink). The results show that the capacity of heat removal of micro-channel heat sinks with flow obstructions is much better than that of the corresponding straight micro-channel heat sink. It is found that the length of the flow obstructions has a major influence on thermal performance. In other words, the flow obstructions placed in the micro-channel heat sink can improve thermal performance.},
  author       = {Xie, Gongnan and Li, Yanlong and Zhang, Fengli and Sundén, Bengt},
  issn         = {1040-7782},
  language     = {eng},
  number       = {4},
  pages        = {335--351},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer Part A: Applications},
  title        = {Analysis of micro-channel heat sinks with rectangular-shaped flow obstructions},
  url          = {http://dx.doi.org/10.1080/10407782.2015.1080580},
  volume       = {69},
  year         = {2016},
}