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Science and Technology of Nuclear Installations
Volume 2009, Article ID 953527, 8 pages
Research Article

Modeling of Multisize Bubbly Flow and Application to the Simulation of Boiling Flows with the Neptune_CFD Code

1Commissariat à l'Energie Atomique, DEN/DER/SSTH/LMDL, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
2R&D Division, Electricité de France, 6 Quai Watier, 78400 Chatou, France

Received 19 December 2007; Accepted 9 June 2008

Academic Editor: Fabio Moretti

Copyright © 2009 Christophe Morel and Jérôme M. Laviéville. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper describes the modeling of boiling multisize bubbly flows and its application to the simulation of the DEBORA experiment. We follow the method proposed originally by Kamp, assuming a given mathematical expression for the bubble diameter pdf. The original model is completed by the addition of some new terms for vapor compressibility and phase change. The liquid-to-interface heat transfer term, which essentially determines the bubbles condensation rate in the DEBORA experiment, is also modeled with care. First numerical results realized with the Neptune_CFD code are presented and discussed.