A bubble mechanistic model for subcooled boiling flow predictions

Yeoh, G and Tu, J 2004, 'A bubble mechanistic model for subcooled boiling flow predictions', Numerical Heat Transfer Part B: Fundamentals, vol. 45, pp. 1-19.


Document type: Journal Article
Collection: Journal Articles

Title A bubble mechanistic model for subcooled boiling flow predictions
Author(s) Yeoh, G
Tu, J
Year 2004
Journal name Numerical Heat Transfer Part B: Fundamentals
Volume number 45
Start page 1
End page 19
Total pages 18
Publisher Taylor and Francis
Abstract Population balance equations combined with a three-dimensional two-fluid model are employed to predict subcooled boiling flow at low pressure in a vertical annular channel. The MUSIG (Multiple-Size-Group) model implemented in CFX4.4 is extended to account for the wall nucleation and condensation in the subcooled boiling regime. Comparison of model predictions against local measurements is made for the void fraction, bubble Sauter diameter, interfacial area concentration, bubble population density, and gas and liquid velocities covering a range of different mass and heat fluxes and inlet subcooling temperatures. Good agreement is achieved with the local radial void fraction, bubble Sauter diameter, interfacial area concentration, bubble population density, and liquid velocity profiles against measurements. However, further improvement is needed for the accurate prediction of the vapor velocity using the present bubble mechanistic model. A proposal to include an algebraic slip model to account for bubble separation in the MUSIG boiling model is presented.
Subject Mechanical Engineering not elsewhere classified
Keyword(s) subcooled boiling
bubble mechanics model
DOI - identifier 10.1080/10407790490268959
Copyright notice Copyright © Taylor & Francis Inc.
ISSN 1040-7790
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