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Wall heat transfer coefficient for condensation and boiling in forced convection of sodium

Journal Article · · Nucl. Sci. Eng.; (United States)
OSTI ID:5958525
The wall heat transfer coefficient for sodium boiling and condensation in forced convective flow is theoretically derived by using the momentum-heat transfer analogy and the logarithmic law for velocity distribution in the liquid film. Only one constant in the logarithmic form is empirically determined. The results are insensitive to some of the approximations used, namely in the evaluation of E and of /tau/ /SUB i/ //tau/ /SUB w/. The results from the suggested correlation are in good agreement with the Zeigarnick and Litvinov data over the range of parameters that were specified in their experiments, while the Chen and NATOF correlations predict lower heat transfer coefficients. The suggested correlation predicts well the data in the high-heat transfer coefficient region. It can be argued that the data in the low heat transfer coefficient region are affected by unstable flow conditions and the uncertainties in the saturation-temperature measurements.
Research Organization:
Massachusetts Institute of Technology, Department of Nuclear Engineering, Cambridge, Massachusetts 02139
OSTI ID:
5958525
Journal Information:
Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 81:3; ISSN NSENA
Country of Publication:
United States
Language:
English