한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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동심이중관내 나노유체의 자연대류열전달에 관한 수치적 연구

NUMERICAL STUDY ON NATURAL CONVECTION HEAT TRANSFER IN A NANOFLUID FILLED CONCENTRIC ANNULUS

  • Choi, H.K. (Dept. of Mechanical Engineering, Changwon National Univ.) ;
  • Park, J.H. (Dept. of Mechanical Engineering, Changwon National Univ.) ;
  • Yoo, G.J. (Dept. of Mechanical Engineering, Changwon National Univ.)
  • 투고 : 2016.04.29
  • 심사 : 2016.09.09
  • 발행 : 2016.09.30
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초록

In the present study, the homogeneous model is used to simulate the natural convection heat transfer of the CuO-water nanofluid in a concentric annular enclosure. Simulations have been carried while the Rayleigh number ranges from $10^3$ to $10^6$, solid volume fraction ranges from 0.01 to 0.04 and the radius ratio varies between 0.1 and 0.7. Results are presented in the form of streamlines, isotherm patterns and averaged Nusselt numbers for different values of solid volume fraction, radius ratio of the annulus and Rayleigh numbers. The results show that by decreasing the radius ratio and/or increasing the Rayleigh number, the averaged Nusselt number increases. Also the heat transfer rate increases as increased solid volume fractions.

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참고문헌

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