The influence of bubble size on void fraction distribution in subcooled flow boiling at low pressure
- Australian Nuclear Science and Technology Organisation, Menai, New South Wales (Australia)
Subcooled flow boiling is encountered in many applications: nuclear reactors, boilers, refrigeration systems, and heat exchangers. The effect of bubble size on void fraction distribution in subcooled flow boiling in a vertical annular channel at low pressure is studied numerically. It is found that a simple linear formula used by Anglart and Nylund and adopted for calculation of bubble size as a function of local subcooling lacks a physical and experimental basis limiting the general application of the model for predicting subcooled flow boiling. A bubble size correlation proposed by Zeitoun and Shoukri has been employed in this study. The predictions of void fraction profiles and the bubble size distributions, after incorporating the above bubble size correction, show very good agreement with the experimental data.
- OSTI ID:
- 6383045
- Journal Information:
- International Communications in Heat and Mass Transfer, Vol. 26:5; ISSN 0735-1933
- Country of Publication:
- United States
- Language:
- English
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