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

Sensors

Gui-Lian Wang²  Da-Wei Yang²  Yan Wang²  Di Niu²  Xiao-Lin Zhao²  Gui-Fu Ding¹ 

[1] Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, No. 800 Dong Chuan Road, Shanghai 200240, China;

关键词: microfluidic heat sink;    micro-rib;    heat transfer;    friction factor;   

DOI  :  10.3390/s150409547

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.