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Constructal Parallel-Flow and Counterflow Microchannel Heat Sinks with Bifurcations

Zhang, Fengli; Sundén, Bengt LU ; Zhang, Weihong and Xie, Gongnan (2015) In Numerical Heat Transfer Part A: Applications 68(10). p.1087-1105
Abstract
Based on the Constructal Theory, parallel-flow and counterflow microchannels heat sinks with bifurcations are put forward to manage the temperature nonuniformity and further reduce the temperature of microchannel heat sinks bottom plates. Several models with different lengths of bifurcations are designed, and the corresponding laminar fluid flow and heat transfer of all models have been investigated through numerical simulations. The pressure, velocity, temperature distributions, and averaged Nusselt numbers are analyzed in details, and then the overall thermal resistances and overall thermal performance are compared. The results show that the thermal performance of counterflow microchannel heat sinks is better than that of parallel-flow... (More)
Based on the Constructal Theory, parallel-flow and counterflow microchannels heat sinks with bifurcations are put forward to manage the temperature nonuniformity and further reduce the temperature of microchannel heat sinks bottom plates. Several models with different lengths of bifurcations are designed, and the corresponding laminar fluid flow and heat transfer of all models have been investigated through numerical simulations. The pressure, velocity, temperature distributions, and averaged Nusselt numbers are analyzed in details, and then the overall thermal resistances and overall thermal performance are compared. The results show that the thermal performance of counterflow microchannel heat sinks is better than that of parallel-flow heat sinks for the same geometry, and bifurcation can improve the thermal performance for all cases. It is suggested that a proper design of the length of bifurcation counterflow microchannel can be employed to improve the overall thermal performance of microchannel heat sinks. The study complements and extends previous works. (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
68
issue
10
pages
1087 - 1105
publisher
Taylor & Francis
external identifiers
  • wos:000356678100004
  • scopus:84932136064
ISSN
1040-7782
DOI
10.1080/10407782.2015.1023148
language
English
LU publication?
yes
id
5042270c-02c3-4d64-97f1-ec3fec1083ee (old id 7584772)
date added to LUP
2015-07-23 07:39:00
date last changed
2017-09-03 04:21:22
@article{5042270c-02c3-4d64-97f1-ec3fec1083ee,
  abstract     = {Based on the Constructal Theory, parallel-flow and counterflow microchannels heat sinks with bifurcations are put forward to manage the temperature nonuniformity and further reduce the temperature of microchannel heat sinks bottom plates. Several models with different lengths of bifurcations are designed, and the corresponding laminar fluid flow and heat transfer of all models have been investigated through numerical simulations. The pressure, velocity, temperature distributions, and averaged Nusselt numbers are analyzed in details, and then the overall thermal resistances and overall thermal performance are compared. The results show that the thermal performance of counterflow microchannel heat sinks is better than that of parallel-flow heat sinks for the same geometry, and bifurcation can improve the thermal performance for all cases. It is suggested that a proper design of the length of bifurcation counterflow microchannel can be employed to improve the overall thermal performance of microchannel heat sinks. The study complements and extends previous works.},
  author       = {Zhang, Fengli and Sundén, Bengt and Zhang, Weihong and Xie, Gongnan},
  issn         = {1040-7782},
  language     = {eng},
  number       = {10},
  pages        = {1087--1105},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer Part A: Applications},
  title        = {Constructal Parallel-Flow and Counterflow Microchannel Heat Sinks with Bifurcations},
  url          = {http://dx.doi.org/10.1080/10407782.2015.1023148},
  volume       = {68},
  year         = {2015},
}