The mixing of immiscible liquid layers by gas bubbling
Technical Report
·
OSTI ID:6625567
A mechanistic model of the mixing of two layers of immiscible fluids by gas bubbling is presented. The model is based upon the conceptual framework of a bubble lifting a droplet of heavy fluid into the light fluid and releasing it when the bubble breaks at the upper surface. The model predicts the degree of entrainment for any rate of gas flow. The rate of heat transfer between the two layers is also predicted. Comparison of the model predictions and experimental data is found to be good. A comparison with experiments of an existing correlation by Calderbank for emulsification by aereation is also presented. Applying the model to molten core-concrete interactions indicates that a three-layered concept, heavy oxide/metallic/light oxide, is unstable. A more likely situation would be a completely entrained system or a partially entrained two layer, oxide metallic, system depending upon the gas velocity. 13 refs., 12 figs., 2 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Div. of Reactor Systems Safety; Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6625567
- Report Number(s):
- NUREG/CR-5219; SAND-88-7118; ON: TI89003233
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACTINIDE COMPOUNDS
BUBBLES
BUILDING MATERIALS
CHALCOGENIDES
CONCRETES
ELEMENTS
ENERGY TRANSFER
ENTRAINMENT
FLUID FLOW
FLUID-STRUCTURE INTERACTIONS
FLUIDS
GAS FLOW
GASES
HEAT TRANSFER
LAYERS
MATERIALS
MATHEMATICAL MODELS
METALS
MIXING
MOLTEN METAL-WATER REACTIONS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
REACTOR COMPONENTS
REACTOR CORES
REACTOR SAFETY
SAFETY
TRANSITION ELEMENT COMPOUNDS
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS
URANIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACTINIDE COMPOUNDS
BUBBLES
BUILDING MATERIALS
CHALCOGENIDES
CONCRETES
ELEMENTS
ENERGY TRANSFER
ENTRAINMENT
FLUID FLOW
FLUID-STRUCTURE INTERACTIONS
FLUIDS
GAS FLOW
GASES
HEAT TRANSFER
LAYERS
MATERIALS
MATHEMATICAL MODELS
METALS
MIXING
MOLTEN METAL-WATER REACTIONS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
REACTOR COMPONENTS
REACTOR CORES
REACTOR SAFETY
SAFETY
TRANSITION ELEMENT COMPOUNDS
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS
URANIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES