Modeling Bubbly-Cap Flows Using Two-Group Average Bubble Number Density
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
A9-3 Interfacial Area Transport - Computational

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 [1] 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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