Numerical investigation of flow instability in a low-pressure subcooled boiling channel

Li, Y, Yeoh, G and Tu, J 2003, 'Numerical investigation of flow instability in a low-pressure subcooled boiling channel', in S. Armfield et al. (ed.) Proceedings of the Second International Conference on Computational Fluid Dynamics, Sydney, 19 February 2004.


Document type: Conference Paper
Collection: Conference Papers

Title Numerical investigation of flow instability in a low-pressure subcooled boiling channel
Author(s) Li, Y
Yeoh, G
Tu, J
Year 2003
Conference name International Conference on Computational Fluid Dynamics
Conference location Sydney
Conference dates 19 February 2004
Proceedings title Proceedings of the Second International Conference on Computational Fluid Dynamics
Editor(s) S. Armfield et al.
Publisher Springer
Place of publication Berlin
Abstract A three-dimensional two-fluid model to predict subcooled boiling flow at low pressure is presented. The model is adopted to investigate the two-phase flow and heat transfer characteristics in a heated channel. The presence of bubbles as a consequence of heating flow through a vertical rectangular channel has a significant effect on the overall pressure drop along the channel. Numerical results were compared against a series experimental data performed at various conditions - mass flux, heat flux, inlet temperature and exit pressure. Good agreement on the overall pressure drop was achieved. The onset of flow instability velocity was also accurately determined when compared against measurements. Predicted results of void fraction provided useful information towards a more fundamental understanding of the occurrence of onset of nucleate boiling, onset of significant voiding and onset of flow instability. The phenomenon of boiling onset oscillations was also predicted through the use of the two-fluid model.
Subjects Aerodynamics (excl. Hypersonic Aerodynamics)
DOI - identifier 10.1007/s00231-003-0423-2
Copyright notice © Springer-Verlag 2003
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