ARTICLE:

• Turbulent Heat Transfer to Heavy Liquid Metals in Circular Tubes  download article

X. Cheng
Institute of Nuclear and Energy Technology, Forschungszentrum Karlsruhe Postfach 3640, 76021, Karlsruhe, Germany

H.Y. Chen
Institute of Nuclear and Energy Technology, Forschungszentrum Karlsruhe Postfach 3640, 76021, Karlsruhe, Germany

N.I. Tak
Institute of Nuclear and Energy Technology, Forschungszentrum Karlsruhe Postfach 3640, 76021,Karlsruhe, Germany

A. Batta
Institute of Nuclear and Energy Technology, Forschungszentrum Karlsruhe Postfach 3640, 76021, Karlsruhe, Germany

ABSTRACT

The present paper gives a brief literature review on turbulent heat transfer in heavy liquid metals (HLM), especially liquid lead-bismuth eutectic (LBE). Some models available in the open literature on heat transfer and turbulent Prandtl number are assessed.
In addition, CFD analysis is carried out for circular tube geometries. The effect of turbulence models, mesh structure and turbulent Prandtl number on the numerical results is studied. Application of ε-type turbulence models with scalable wall treatment shows less dependence of the numerical results on mesh structure than the ω-type turbulence models with automatic wall treatment. The turbulent Prandtl number affects strongly the heat transfer performance. Comparison between the CFD results, heat transfer correlations and heat transfer test data reveals a decrease in turbulent Prandtl number by increasing Reynolds number.
Based on the results achieved, recommendations are made on correlations of heat transfer and turbulent Prandtl number for LBE flows.

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237-247 pages

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