Two-dimensional Heat Conduction and Convective Heat Transfer a Circular Tube in Cross Flow

원관 주위의 2차원 전도열전달과 국소 대류열전달

  • 이억수 (부경대학교 기계공학부)
  • Published : 2005.01.01

Abstract

When a circular tube with uniform heat generation within the wall was placed in a cross flow, heat flows by conduction in the circumferential direction due to the asymmetric nature of the fluid flow around the perimeter of the circular tube The circumferential heat flow affects the wall temperature distribution to such an extent that. in some cases, significantly different results may be obtained for geometrically similar surfaces. In the present investigation, the effect of circumferential wall heat conduction is investigated for forced convection around circular tube in cross flow of air and water Two-dimensional temperature distribution $T_w(r,{\theta})$ is calculated through the numerical analysis. The difference between one-dimensional and two-dimensional solutions is demonstrated on the graph of local heat transfer coefficients. It is observed that the effect of working fluid is very remarkable.

Keywords

References

  1. A. M. Petrie and H. C. Simpson, 'An experimental study of the sensitivity to free stream turblance of heat transfer in wakes of cylinders in cross flow,' Int. J. Heat Mass Transfer, Vol.15, pp. 1497-1513, 1972 https://doi.org/10.1016/0017-9310(72)90007-5
  2. W. H. Giedt, 'Investigation of variation of point unit heat transfer coefficient around a cylinder normal to an air stream,' Trans. ASME, Vol. 71, pp. 375-381. 1949
  3. A, Zukauskas and J. ZiugZda, Heat Transfer of a Cylinder in Cross-flow, Hemisphere Publishing Corporation, 1985
  4. Y. Lee, and S. G. Kakade, 'Effect of peripheral wall conduction on heat transfer from a cylinder in cross flow,' Int. J. Heat Mass Transfer, Vol. 19, pp. 1031-1037. 1976 https://doi.org/10.1016/0017-9310(76)90186-1
  5. S. G. Kakade, Effect of Peripheral Wall Conduction on Heat Transfer from a Cylinder in Cross Flow, M.S. Thesis. University of Ottawa, 1972
  6. Y. Lee, Y. Zeng and T. Shigechi, 'Conjugated Heat Transfer of Nucleate Pool Boiling on a Horizontal Tube,' Int. J. Multiphase Flow, Vol. 16, No. 3. PP. 421-428. 1990 https://doi.org/10.1016/0301-9322(90)90073-R
  7. J. W. Baughn, 'Effect of circumferential wall heat conduction on boundary conditions for heat transfer in a circular tubes.' Trans. ASME, J. Heat Transfer. Vol. 100, pp. 537-539, 1978 https://doi.org/10.1115/1.3450844
  8. S. M. Morcos and A. E. Bergles, 'Experimental investigation of combined foced and free laminar convection in horizontal tubes,' ASME J. Heat Transfer, pp. 212-219, 1975