The mixing of immiscible liquid layers by gas bubbling
By: prepared by A.J. Suo-Anttila.
Contributors: U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Reactor and Plant Systems.; Sandia National Laboratories.
Publisher: Division of Reactor System Safety, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission
Published: 1988
Place of publication: Washington, DC
Language: eng
Subjects: Gas flow.
Description: 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.
Notes: "Sandia National Laboratories."

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