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Constructal Theory Based Geometric Optimization of Wavy Channels in the Low Reynolds Number Regime

Xie, Gongnan; Asadi, Masoud; Sundén, Bengt LU and Zheng, Shaofei (2014) In Journal of Electronic Packaging 136(3).
Abstract
To obtain better fluid mixing and higher heat transfer in the low Reynolds number regime, various wavy fins are employed in heat sinks (heat exchangers) for electronic cooling applications. However, it was reported in previous works that in the low Reynolds number regime there are no remarkable differences in the thermal performance of a straight-plate and a wavy-wall channel. In this study, the constructal theory is applied to optimize the geometry of wavy-wall channels of an electronic heat sink, where the objective is to minimize the global thermal resistance. The domain has three degrees of freedom: The interplate-spacing (S), the wavelength ratio (lambda(1)/lambda(2)), and the amplitude ratio (a(1)/a(2)). The two times minimized... (More)
To obtain better fluid mixing and higher heat transfer in the low Reynolds number regime, various wavy fins are employed in heat sinks (heat exchangers) for electronic cooling applications. However, it was reported in previous works that in the low Reynolds number regime there are no remarkable differences in the thermal performance of a straight-plate and a wavy-wall channel. In this study, the constructal theory is applied to optimize the geometry of wavy-wall channels of an electronic heat sink, where the objective is to minimize the global thermal resistance. The domain has three degrees of freedom: The interplate-spacing (S), the wavelength ratio (lambda(1)/lambda(2)), and the amplitude ratio (a(1)/a(2)). The two times minimized global thermal resistance indicates that the thermal-hydraulic performance of the wavy channels is unaffected by the amplitude ratio, while the wavelength ratio and interplate separation have strong impacts on the overall performance. In addition, the thermal performances at four Reynolds numbers are evaluated, and it is found that the constructal-wavy channels can exhibit much better thermal performance in the low Reynolds number regime. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
constructal theory, Dean vortices, global thermal resistance, wavy, channels, optimization design, low Reynolds number
in
Journal of Electronic Packaging
volume
136
issue
3
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • wos:000340776400014
  • scopus:84902258116
ISSN
1043-7398
DOI
10.1115/1.4027728
language
English
LU publication?
yes
id
67113f3e-1947-4c30-a760-a3b113e86c88 (old id 4648911)
date added to LUP
2014-09-24 08:52:16
date last changed
2017-05-28 03:15:49
@article{67113f3e-1947-4c30-a760-a3b113e86c88,
  abstract     = {To obtain better fluid mixing and higher heat transfer in the low Reynolds number regime, various wavy fins are employed in heat sinks (heat exchangers) for electronic cooling applications. However, it was reported in previous works that in the low Reynolds number regime there are no remarkable differences in the thermal performance of a straight-plate and a wavy-wall channel. In this study, the constructal theory is applied to optimize the geometry of wavy-wall channels of an electronic heat sink, where the objective is to minimize the global thermal resistance. The domain has three degrees of freedom: The interplate-spacing (S), the wavelength ratio (lambda(1)/lambda(2)), and the amplitude ratio (a(1)/a(2)). The two times minimized global thermal resistance indicates that the thermal-hydraulic performance of the wavy channels is unaffected by the amplitude ratio, while the wavelength ratio and interplate separation have strong impacts on the overall performance. In addition, the thermal performances at four Reynolds numbers are evaluated, and it is found that the constructal-wavy channels can exhibit much better thermal performance in the low Reynolds number regime.},
  articleno    = {031013},
  author       = {Xie, Gongnan and Asadi, Masoud and Sundén, Bengt and Zheng, Shaofei},
  issn         = {1043-7398},
  keyword      = {constructal theory,Dean vortices,global thermal resistance,wavy,channels,optimization design,low Reynolds number},
  language     = {eng},
  number       = {3},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Electronic Packaging},
  title        = {Constructal Theory Based Geometric Optimization of Wavy Channels in the Low Reynolds Number Regime},
  url          = {http://dx.doi.org/10.1115/1.4027728},
  volume       = {136},
  year         = {2014},
}