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Numerical Analysis of the Turbulent Flow and Heat Transfer in a Heated Rod Bundle  

In Wang-Kee (Korea Atomic Energy Research Institute)
Shin Chang-Hwan (Korea Atomic Energy Research Institute)
Oh Dong-Seok (Korea Atomic Energy Research Institute)
Chun Tae-Hyun (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.36, no.2, 2004 , pp. 153-164 More about this Journal
Abstract
A computational fluid dynamics (CFD) analysis has been performed to investigate the turbulent flow and heat transfer in a triangular rod bundle with pitch-to-diameter ratios (P/D) of 1.06 and 1.12. Anisotropic turbulence models predicted the turbulence-driven secondary flow in a triangular subchannel and the distributions of the time mean velocity and temperature, showing a significantly improved agreement with the measurements from the linear standard $k-{\epsilon}$ model. The anisotropic turbulence models predicted the turbulence structure for a rod bundle with a large P/D fairly well, but could not predict the very high turbulent intensity of the azimuthal velocity observed in the narrow flow region (gap) for a rod bundle with a small P/D.
Keywords
rod bundle; CFD; turbulence; heat transfer; secondary flow;
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