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�������պ����ѧѧ�� 2011, Vol. 37 Issue (6) :738-742    DOI:
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�������պ����ѧ ���շ��������������ص�ʵ����, ���� 100191
Flow and heat transfer characteristics in laminar flow through random rough microchannels
Miao Hui, Huang Yong, Chen Haigang*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The flow and heat transfer characteristics of water in laminar flow through random roughness microchannels were investigated numerically. Two random rough microchannels were modeled by a simple method. And another microchannel was designed with periodically distributed roughness for compare. The Re range was 100~2 000. Results show that the Poiseuille number (Po) and the Nusselt number (Nu) in three rough microchannels are all larger than that in smooth channels significantly, and increase slightly with Re. In addition, Po and Nu in random roughness microchannels are all smaller than that in regular roughness microchannel. It could be concluded that the effect of roughness on local Nusselt number is attributed to the variation of velocity and the intersection angle between velocity and temperature gradient together.
Keywords�� microchannel heat sink   liquid cooling   heat transfer enhancement   random roughness     
Received 2010-06-01;
About author: �� ��(1984-),��,���ϻ�����,��ʿ��,miaohui@sjp.buaa.edu.cn.
���, ����, �º���.����ֲ�΢ͨ���е������ʹ�������[J]  �������պ����ѧѧ��, 2011,V37(6): 738-742
Miao Hui, Huang Yong, Chen Haigang.Flow and heat transfer characteristics in laminar flow through random rough microchannels[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(6): 738-742
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