Optimisation of single and double layer counter flow microchannel heat sinks

2002 ◽  
Vol 22 (14) ◽  
pp. 1569-1585 ◽  
Author(s):  
S.H. Chong ◽  
K.T. Ooi ◽  
T.N. Wong
Keyword(s):  
Double Layer ◽  
Heat Sinks ◽  
Counter Flow ◽  
Microchannel Heat Sinks

Convective Heat Transfer of Parallel-Flow and Counter-Flow Double-Layer Microchannel Heat Sinks in Staggered Arrangement

2017 ◽  
Author(s):  
Han Shen ◽  
Yingchun Zhang ◽  
Hongbin Yan ◽  
Bengt Sunden ◽  
Gongnan Xie
Keyword(s):  
Heat Transfer ◽  
Double Layer ◽  
Electronic Devices ◽  
Structure Design ◽  
Parallel Flow ◽  
Heat Sinks ◽  
Counter Flow ◽  
Microchannel Heat Sinks ◽  
Staggered Arrangement ◽  
Flow Case

Previous research has proved Double-layer Microchannel Heat Sinks (MHSs) to be efficient ways to improve the cooling performance of electronic devices. However, the cooling potential of the upper working liquid cannot be fully utilized to cool down the substrate with the heated elements. In this sense, a concept of staggered double-layer MHS is proposed and designed. The parallel and counter flow directions are considered to investigate the flow arrangement effect. The Reynolds number effect, Nusselt number and pressure drop are analyzed in detail and compared with those of a parallel straight double-layer MHS. It is found that the staggered double-layer MHSs exhibit much better heat transfer enhancement and overall thermal performance compared with the parallel straight double-layer MHS. For the staggered double-layer MHSs, the counter flow case is superior to the parallel flow case. This research provides a new structure design to enhance the heat transfer in microchannel heat sinks and broad application prospects for heat sinks in the thermal management of high power density electronic devices.

Effect of porous substrates on thermohydraulic performance enhancement of double layer microchannel heat sinks

2019 ◽  
Vol 131 ◽  
pp. 52-63 ◽  
Author(s):  
Ali Ghahremannezhad ◽  
Huijin Xu ◽  
Mohammad Alhuyi Nazari ◽  
Mohammad Hossein Ahmadi ◽  
Kambiz Vafai
Keyword(s):  
Double Layer ◽  
Performance Enhancement ◽  
Heat Sinks ◽  
Microchannel Heat Sinks ◽  
Porous Substrates

scholarly journals Temperature Uniformity in Cross-Flow Double-Layered Microchannel Heat Sinks

Fluids ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 143
Author(s):  
Carlo Nonino ◽  
Stefano Savino
Keyword(s):  
Numerical Study ◽  
Cross Flow ◽  
Bottom Layer ◽  
Heat Sinks ◽  
Temperature Uniformity ◽  
Counter Flow ◽  
Microchannel Heat Sinks ◽  
Unequal Number ◽  
Flow Configurations ◽  
Header Design

An in-house finite element method (FEM) procedure is used to carry out a numerical study on the thermal behavior of cross-flow double-layered microchannel heat sinks with an unequal number of microchannels in the two layers. The thermal performance is compared with those yielded by other more conventional flow configurations. It is shown that if properly designed, i.e., with several microchannels in the top layer smaller than that in the bottom layer, cross-flow double-layered microchannel heat sinks can provide an acceptable thermal resistance and a reasonably good temperature uniformity of the heated base with a header design that is much simpler than that required by the counter-flow arrangement.

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