Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study of n Multigrid Finite-Volume Method for Radiation

다중격자 유한체적법에 의한 복사열전달 해석

  • 김만영 (현대자동차 승용디젤엔진시험팀) ;
  • 변도영 (한국과학기술기획평가원) ;
  • 백승욱 (KAIST 기계공학과 항공우주공학 전공)
  • Published : 2003.01.01
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Abstract

The convergence of finite volume method (FVM) or discrete ordinate method (DOM) is known to degrade for optical thickness greater than unity and large scattering albedo. The present article presents a convergence acceleration procedure for the FVM based on a full approximation storage (FAS) multigrid method. Among a variety of multigrid cycles, the V-cycle is used and the full multigrid algorithm (FMG) is applied to an analysis of radiation in irregular two-dimensional geometry. Solution convergence is discussed for the several cases of various optical thickness and scattering albedo. At small scattering albedo and optical thickness, there is no advantage to using the multigrid method for calculation CPU time. For large scattering albedo greater than 0.5 and optical thickness greater than unity, however, the multigrid method improves the convergence and the solution is rapidly obtained.

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References

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