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�������պ����ѧѧ�� 2009, Vol. 35 Issue (3) :313-317    DOI:
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Numerical analysis of flow and heat transfer characteristics of Y-fractal-link micro channel networks
Xu Guoqiang, Wang Meng, Wu Hong, Tao Zhi*
National Key Lab on Air Engine,Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� A new fractal structure, Y-fractal-link micro channel network, was proposed for cooling the inside of cubic chip. Numerical simulations of laminar heat and flow transfer were conducted for both Y-fractal-link micro channel network and straight parallel micro channel network. In addition, the optimization of this new structure was discussed with some important parameters. Results reveal that with the same convective surface area and hydraulic diameter, Y-fractal-link micro channel network could significantly improve the heat transfer performance of the heat sink and decrease the pressure drop through the micro channel, so this new structure will be useful for cooling devices with high thermal load. In the range of study, the best integrative performance of Y-fractal-link micro channel heat sink is obtained when the number of branching levels is 3; the bifurcation angle is 60 and the number of branches at each level is 2. These results are beneficial to the design and improvement of heat sink configuration.
Keywords�� micro channel   heat sink   fractal   enhancement heat transfer     
Received 2008-04-01;
Fund:

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About author: ���ǿ(1964-),��,�ӱ��е���,����,guoqiang_xu@buaa.edu.cn.
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���ǿ, �� ��, �� ��, �� ��.�ι���΢ͨ�������������Ե���ֵ����[J]  �������պ����ѧѧ��, 2009,V35(3): 313-317
Xu Guoqiang, Wang Meng, Wu Hong, Tao Zhi.Numerical analysis of flow and heat transfer characteristics of Y-fractal-link micro channel networks[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(3): 313-317
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