Conference Proceedings Paper
Modeling Bubbly-Cap Flows Using Two-Group Average Bubble Number Density
NURETH-14 - 2011 September 25-30
Guan Heng Yeoh (ANSTO)
Sherman Cheung (RMIT University)
Jiyuan Tu (RMIT University)
Eckhard Krepper (Helmholtz-Zentrum Dresden-Rossendorf)
Dirk Lucas (HZDR)
The basic concept of two-group average bubble number density equations along with three-fluid model has been demonstrated for vertical gas-liquid flow. Specifically, the current study focused on: (i) classification of bubble interaction between spherical bubbles (Group-1) and cap bubbles (Group-2), (ii) preliminary consideration of source and sink terms in the averaged bubble number density equations via the model of Hibiki and Ishii  and (iii) assessment by means of experimental data sets at bubbly-to-cap flow transition. Reasonable agreement was achieved between measured and predicted distributions of void fraction, interfacial area concentration (IAC) and volume equivalent bubble diameter.
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