Journal
APPLIED THERMAL ENGINEERING
Volume 73, Issue 1, Pages 185-195Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2014.07.031
Keywords
Microchannel heat sink; Y-shaped plates; Bifurcation flow; Laminar heat transfer; CFD
Funding
- National Natural Science Foundation of China [11202164]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20116102120021]
- NPU Foundation for Fundamental Research [NPU-FFR-JC20130115]
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With increasing output power of integrated chips, the involved heat flux is accordingly increased. Traditional cooling methods failed to satisfy such a situation, and thus new cooling methods incorporating microchannel heat sinks with high capabilities of heat removal are necessary. In this paper, on the basis of a water-cooled smooth microchannel heat sink, vertical Y-shaped bifurcation plates are designed into the heat sink, and then the corresponding laminar flow and heat transfer are investigated numerically. Four different configurations of Y-shaped plates are considered by adjusting the angle between the two arms of the Y profile. The effects of the angle on heat transfer, pressure drop, and the thermal resistance are also observed and compared with those of the traditional straight microchannel heat sink without bifurcation flow. The overall resistances subjected to inlet Reynolds number and pumping power are also compared for the five microchannel heat sinks. The results show that the thermal performance of the microchannel heat sinks with Y-shaped bifurcation plates is much better than that of the corresponding straight channel. It is suggested that the Y-shaped bifurcation plates placed in water-cooled microchannel heat sinks could improve the overall thermal performance when the angle between the two arms of the Y-shaped plates is designed properly. (C) 2014 Elsevier Ltd. All rights reserved.
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