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Sensors 2015, 15(4), 9547-9562; doi:10.3390/s150409547

Heat Transfer and Friction Characteristics of the Microfluidic Heat Sink with Variously-Shaped Ribs for Chip Cooling

Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, No. 800 Dong Chuan Road, Shanghai 200240, China
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Academic Editor: Stefano Mariani
Received: 10 February 2015 / Revised: 1 April 2015 / Accepted: 13 April 2015 / Published: 22 April 2015
(This article belongs to the Special Issue Modeling, Testing and Reliability Issues in MEMS Engineering)
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Abstract

This paper experimentally and numerically investigated the heat transfer and friction characteristics of microfluidic heat sinks with variously-shaped micro-ribs, i.e., rectangular, triangular and semicircular ribs. The micro-ribs were fabricated on the sidewalls of microfluidic channels by a surface-micromachining micro-electro-mechanical system (MEMS) process and used as turbulators to improve the heat transfer rate of the microfluidic heat sink. The results indicate that the utilizing of micro-ribs provides a better heat transfer rate, but also increases the pressure drop penalty for microchannels. Furthermore, the heat transfer and friction characteristics of the microchannels are strongly affected by the rib shape. In comparison, the triangular ribbed microchannel possesses the highest Nusselt number and friction factor among the three rib types. View Full-Text
Keywords: microfluidic heat sink; micro-rib; heat transfer; friction factor microfluidic heat sink; micro-rib; heat transfer; friction factor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, G.-L.; Yang, D.-W.; Wang, Y.; Niu, D.; Zhao, X.-L.; Ding, G.-F. Heat Transfer and Friction Characteristics of the Microfluidic Heat Sink with Variously-Shaped Ribs for Chip Cooling. Sensors 2015, 15, 9547-9562.

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