ABSTRACT
An experimental study has been made of the interactions between air bubbles and an oil-water mixture flowing through a vertical tube. Particular attention was paid to the influence on the critical concentration of oil where phase inversion occurs and on the pressure drop increase during phase inversion. It was found that gas injection does not significantly change the critical concentration at phase inversion. In general, the pressure drop is smaller than for liquid-liquid flow only, except around phase inversion where the influence of gas injection is small on the pressure drop. Furthermore, the coalescence mechanisms appear to be different depending on which phase is continuous.
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2007. BHR Group 2007 Multiphase Production Technology 13
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