Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Combined Convection and Radiation in a Tube with Circumferential Fins and Circular Disks

  • Kim, Namjin (Graduate School, Inha University) ;
  • Lee, Jaeyong (Graduate School, Inha University) ;
  • Taebeom Seo (Department of Mechanical Engineering, Inha University) ;
  • Kim, Chongbo (Department of Mechanical Engineering, Inha University)
  • Published : 2002.12.01
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Abstract

Combined convection and radiation heat transfer in a circular tube with circumferential fins and circular disks is investigated for various operating conditions. Using a finite volume technique for steady laminar flow, the governing equations are solved in order to study the flow and temperature fields. The P- 1 approximation and the weighted sum of gray gases model (WSGGM) are used for solving the radiation transport equation. The results show that the total Nusselt number of combined convection and radiation is higher than that of pure convection. If the temperatures of the combustion gas and the wall in a tube are high, radiation becomes dominant. Therefore, it is necessary to evaluate the effect of radiation on the total heat transfer.

Keywords

References

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