A parametric study on thermal performance of microchannel heat sinks with internally vertical bifurcations in laminar liquid flow

2018 ◽  
Vol 117 ◽  
pp. 487-497 ◽  
Author(s):  
Han Shen ◽  
Chi-Chuan Wang ◽  
Gongnan Xie
Keyword(s):  
Thermal Performance ◽  
Liquid Flow ◽  
Parametric Study ◽  
Heat Sinks ◽  
Microchannel Heat Sinks

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

Entropy ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 16 ◽  
Author(s):  
Daxiang Deng ◽  
Guang Pi ◽  
Weixun Zhang ◽  
Peng Wang ◽  
Ting Fu
Keyword(s):  
Pressure Drop ◽  
Thermal Resistance ◽  
Thermal Performance ◽  
Numerical Study ◽  
Heat Sinks ◽  
High Heat Flux ◽  
Pumping Power ◽  
Cross Sectional ◽  
Prime Concern ◽  
Microchannel Heat Sinks

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.

Enhanced Thermal Performance of Internal Y-Shaped Bifurcation Microchannel Heat Sinks With Metal Foams

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Han Shen ◽  
Xueting Liu ◽  
Hongbin Yan ◽  
Gongnan Xie ◽  
Bengt Sunden
Keyword(s):  
Thermal Management ◽  
Thermal Performance ◽  
Metal Foam ◽  
Electronic Devices ◽  
Metal Foams ◽  
Heat Sinks ◽  
High Power Density ◽  
Pore Density ◽  
Transfer Enhancement ◽  
Microchannel Heat Sinks

Internal Y-shaped bifurcation has been proved to be an advantageous way on improving thermal performance of microchannel heat sinks according to the previous research. Metal foams are known due to their predominate performance such as low-density, large surface area, and high thermal conductivity. In this paper, different parameters of metal foams in Y-shaped bifurcation microchannel heat sinks are designed and investigated numerically. The effects of Reynolds number, porosity of metal foam, and the pore density (PPI) of the metal foam on the microchannel heat sinks are analyzed in detail. It is found that the internal Y-shaped bifurcation microchannel heat sinks with metal foam exhibit better heat transfer enhancement and overall thermal performance. This research provides broad application prospects for heat sinks with metal foam in the thermal management of high power density electronic devices.

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