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Numerical Study of Double-Layered Microchannel Heat Sinks with Different Cross-Sectional Shapes.

Authors
  • Deng, Daxiang1, 2
  • Pi, Guang1
  • Zhang, Weixun1
  • Wang, Peng3
  • Fu, Ting4
  • 1 Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China. , (China)
  • 2 Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China. , (China)
  • 3 Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China. , (China)
  • 4 Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering in Wuhan University of Science and Technology, Wuhan 430000, China. , (China)
Type
Published Article
Journal
Entropy
Publisher
MDPI AG
Publication Date
Dec 25, 2018
Volume
21
Issue
1
Identifiers
DOI: 10.3390/e21010016
PMID: 33266732
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This work numerically studies the thermal and hydraulic performance of double-layered microchannel heat sinks (DL-MCHS) for their application in the cooling of high heat flux microelectronic devices. The superiority of double-layered microchannel heat sinks was assessed by a comparison with a single-layered microchannel heat sink (SL-MCHS) with the same triangular microchannels. Five DL-MCHSs with different cross-sectional shapes-triangular, rectangular, trapezoidal, circular and reentrant Ω-shaped-were explored and compared. The results showed that DL-MCHS decreased wall temperatures and thermal resistance considerably, induced much more uniform wall temperature distribution, and reduced the pressure drop and pumping power in comparison with SL-MCHS. The DL-MCHS with trapezoidal microchannels performed the worst with regard to thermal resistance, pressure drop, and pumping power. The DL-MCHS with rectangular microchannels produced the best overall thermal performance and seemed to be the optimum when thermal performance was the prime concern. Nevertheless, the DL-MCHS with reentrant Ω-shaped microchannels should be selected when pumping power consumption was the most important consideration.

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