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Study on the Flow and Heat-Transfer Properties of MicrochannelHeat Sink with Different Pin-Fin Shapes(PDF)

南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2018年01期
Page:
47-
Research Field:
动力工程
Publishing date:

Info

Title:
Study on the Flow and Heat-Transfer Properties of MicrochannelHeat Sink with Different Pin-Fin Shapes
Author(s):
Zhang Xiuqiang12Hua Junye12Zhao Xiaobao12Wu Wei12Li Dong12Li Qihe12
(1.Engineering Laboratory for Energy System Process Conversion and Emission Control Technology of Jiangsu Province,Nanjing Normal University,Nanjing 210042,China)(2.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China)
Keywords:
microchannel heat sinkmicro pin-finfriction coefficientNunumerical simulation
PACS:
TK124
DOI:
10.3969/j.issn.1672-1292.2018.01.007
Abstract:
By using the CFD software and combining with experimental studies we conduct the three-dimension numerical investigation on the characteristics of flow and heat transfer in microchannel heat sink with circular,triangle and square cross-section pin-fin arrays. The flow field and temperature field of the three types pin-fin arrays are obtained for different Reynolds number(Re). Besides,the friction coefficient(f)and Nusselt number(Nu)have been calculated as the criterion of the flow and heat transfer properties of micro pin-fin. The results show that the friction coefficient decreases with the increase of Re,that the frictional resistance coefficient of triangle pin-fin is the smallest with low Re. And that the Nu grows with the increase of Re,and the Nu of circular pin-fin is larger than that of triangle or square,which appears a better heat transfer performance. The assesses of the comprehensive flow and heat transfer performance indicate that the circular pin-fin has better performance than the others. Furthermore,compared with experimental outcome,the numerical results still have some deviation owing to microscale effect while the trend is consistent with experimental results.

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