한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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타원혼합 이차모멘트 모델을 사용한 난류 자연대류 해석

COMPUTATION OF TURBULENT NATURAL CONVECTION WITH THE ELLIPTIC-BLENDING SECOND-MOMENT CLOSURE

  • 최석기 (한국원자력연구원 SFR 계통설계부) ;
  • 한지웅 (한국원자력연구원 SFR 계통설계부) ;
  • 김성오 (한국원자력연구원 SFR 계통설계부) ;
  • 이태호 (한국원자력연구원 SFR 계통설계부)
  • Choi, S.K. (SFR System Design Division, Korea Atomic Energy Research Institute) ;
  • Han, J.W. (SFR System Design Division, Korea Atomic Energy Research Institute) ;
  • Kim, S.O. (SFR System Design Division, Korea Atomic Energy Research Institute) ;
  • Lee, T.H. (SFR System Design Division, Korea Atomic Energy Research Institute)
  • 투고 : 2016.10.20
  • 심사 : 2016.12.13
  • 발행 : 2016.12.31
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초록

In this paper a computation of turbulent natural convection in enclosures with the elliptic-blending based differential and algebraic flux models is presented. The primary emphasis of the study is placed on an investigation of accuracy of the treatment of turbulent heat fluxes with the elliptic-blending second-moment closure for the turbulent natural convection flows. The turbulent heat fluxes in this study are treated by the elliptic-blending based algebraic and differential flux models. The previous turbulence model constants are adjusted to produce accurate solutions. The proposed models are applied to the prediction of turbulent natural convections in a 1:5 rectangular cavity and in a square cavity with conducting top and bottom walls, which are commonly used for validation of the turbulence models. The relative performance between the algebraic and differential flux model is examined through comparing with experimental data. It is shown that both the elliptic-blending based models predict well the mean velocity and temperature, thereby the wall shear stress and Nusselt number. It is also shown that the elliptic-blending based algebraic flux model produces solutions which are as accurate as those by the differential flux model.

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참고문헌

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