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열유속이 있는 난류 원관 유동에의 FLUENT의 2방정식 난류모델의 적용성 판단
문치명(C. M. Moon),백성구(S.G. Baek),박승오(S.O. Park) 한국전산유체공학회 2003 한국전산유체공학회 학술대회논문집 Vol.2003 No.-
This paper assesses the two-equation turbulence models available in a commercial code, FLUENT, for heat transfer in a turbulent heated pipe flow. In case of flow under RED = 10, 000, Standard k-ε and Realizable k-ε models overpredict the Nusselt number about 20% compared with the experimental correlation, and RNG k-ε model overpredicts about 30% when the two-layer zonal method is employed. When wall function method is adopted, all k-ε models show better predictions. Standard k-ω and SST k-ω models have the dependency on the first grid point (0.3<y₁+<3). As Reynolds number becomes high, the predictions of all k-ε and k-ω models are in a good agreement with the experimental correlation.