CFD Simulation of Axial Turbulent Flow in a Triangular Rod Bundle

  • In W.K. (Korea Atomic Energy Res. Inst.) ;
  • Chun T. H. (Korea Atomic Energy Res. Inst.) ;
  • Myong H. K (Kookmin University) ;
  • Ko K (Kookmin University)
  • Published : 2003.10.01

Abstract

A CFD analysis has been made for fully developed turbulent flows in a triangular bare rod bundle with pitch to diameter ratio (P/D) of 1.123. The nonlinear turbulence models predicted the turbulence­driven secondary flow in the triangular subchannel. The nonlinear quadratic $\kappa-\omega$ models by Speziale and Myong-Kasagi predicted turbulence structure in the rod bundle fairly well. The nonlinear quadratic and cubic $\kappa-\omega$ models by Shih et al. and Craft et al. showed somewhat weaker anisotropic turbulence. The differential Reynolds stress model appeared to overpredict the turbulence anisotropy in the rod bundle.

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