Volume 37 Issue 6
Jun.  2011
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Miao Hui, Huang Yong, Chen Haiganget al. Flow and heat transfer characteristics in laminar flow through random rough microchannels[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(6): 738-742. (in Chinese)
Citation: Miao Hui, Huang Yong, Chen Haiganget al. Flow and heat transfer characteristics in laminar flow through random rough microchannels[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(6): 738-742. (in Chinese)

Flow and heat transfer characteristics in laminar flow through random rough microchannels

  • Received Date: 01 Jun 2010
  • Publish Date: 30 Jun 2011
  • 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.

     

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