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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018021156
Forthcoming Article

Numerical Study of Void Fraction and Critical Heat Flux in Subcooled Two Phase Flow Boiling in Boiler Tube

Vimal Sain
Indian Institute of Technology Bombay
Sandip Kumar Saha
Indian Institute of Technology Bombay

RESUMO

In this study, Eulerian multiphase model coupled with the Rensselaer Polytechnic Institute (RPI) wall boiling model and SST k-ω turbulence model is utilized to analyse the subcooled flow boiling heat transfer in a circular vertical boiler tube under constant wall heat flux boundary condition. The numerical model is validated with the experimental results reported in the published literatures. Further, the model is extended to predict the void fraction, two-phase heat transfer coefficient and critical heat flux (CHF) and compared with the available correlations. It is found that the Lockhart-Martinelli parameter based void fraction correlation agrees well with the present numerical predictions and the published experimental results with a maximum deviation less than 1%. The numerical analysis on circular tube using critical heat flux (CHF) model is found to have average deviation of 13% with the results from the literature (Celata et al., 1991).