Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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STUDY ON VIEW FACTOR CALCULATION FOR RADIATIVE HEAT TRANSFER BY USING THE MESH SUBDIVISION METHOD

격자 세분화 방법을 고려한 복사열전달 형상계수 계산 기법 연구

  • Kim, D.G. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Han, K.I. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Choi, J.H. (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Lee, J.J. (Thermal/Propulsion Dept., Korea Aerospace Research Institute Satellite) ;
  • Kim, T.K. (Dept. of Mechanical Engineering, Chung-Ang Univ.)
  • 김동건 (중앙대학교 기계공학부) ;
  • 한국일 (중앙대학교 기계공학부) ;
  • 최준혁 (중앙대학교 기계공학부) ;
  • 이장준 (한국항공우주연구원 위성 열/추진팀) ;
  • 김태국 (중앙대학교 기계공학부)
  • Received : 2013.09.12
  • Accepted : 2014.02.17
  • Published : 2014.03.31
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Abstract

Since experiments on the actual operational status are said to be very impractical because of their economic and repeatability problems, it is difficult to understand the thermal profiles of aerospace or military equipments. Thus, the CFD codes with considering the radiation heat transfer are used to compensate the defect. In case, analyzing the radiation exchanges between the object surfaces are very important. Because the temperature and the IR signal distributions of the object surface are significantly affected by the radiative heat transfer. To achieve accurate thermal radiation exchange between surfaces, it is important to calculate the radiation view factor precisely. Finer subdivision of meshes can be used to increase the accuracy of radiation view factor, but if the mesh is subdivided infinitely, the time required for calculation increases significantly and thus decreasing the efficiency. If the subdivision is not sufficient, assurance of accuracy is not guaranteed. In this paper, optimal mesh subdivision method using the solid angle has been successfully tested and found to be useful in increasing the efficiency of calculating the shape factors.

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References

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