Abstract—In this study, heat transfer of aluminum microchannel heat sinks (MCHs) was investigated with both numerical and experimental methods. Five MCHs, each with twelve channels, were designed with the channel width of 500 μm, channel length of 33 mm, and channel depths varying from 200 μm to 900 μm. Water was used as the working fluid and Reynolds numbers, as independent variables, were in the range of 100 to 1000. For all cases done in this study, it is found that the heat transfer of microchannel heat sinks was significantly affected by the channel depth. At mass flow rate of 213 g/min, when the channel depths increased from 200 μm to 900 μm, the heat fluxes decreased from 31.8 W/cm2 to 15.8 W/cm2 and the heat transfer rate increased from 113.3 W to 143.8 W. Good agreement between numerical and experimental results was achieved, with maximum percentage errors less than 6%.

Index Terms—microchannel heat sink, channel depth, heat transfer rate, heat flux

Cite: Ngoctan Tran, Yaw-Jen Chang, Jyh-tong Teng, and Thanhtrung Dang, "Numerical and Experimental Investigations on Heat Transfer of Aluminum Microchannel Heat Sinks with Different Channel Depths," International Journal of Mechanical Engineering and Robotics Research, Vol.4, No. 3, pp. 204-208, July 2015. DOI: 10.18178/ijmerr.4.3.204-208