Basic Equations of Interfacial Area Transport in Gas-Liquid Two-Phase Flow
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
A9-1 Interfacial Area Transport - Modelling

Isao Kataoka (Osaka University)
Kenji Yoshida (Osaka University)
Masanori Naitoh (Nuclear Power Engineering Center, Safety Analysis Group, The Institute of Applied Energy)
Hidetoshi Okada (Nuclear Power Engineering Center, Safety Analysis Group, The Institute of Applied Energy)
Tadashi Morii (Japan Nuclear Energy Safety Organization)


The rigorous and consistent formulations of basic equations of interfacial area transport were derived using correlation functions of characteristic function of each phase and velocities of each phase.Turbulent transport term of interfacial area concentration was consistently derived and related to the difference between interfacial velocity and averaged velocity of each phase. Constitutive equations of turbulent transport terms of interfacial area concentration were proposed for bubbly flow. New transport model and constitutive equations were developed for churn flow.These models and constitutive equations are validated by experimental data of radial distributions of interfacial area concentration in bubbly and churn flow.

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