HYBRID MULTIPHASE CFD SIMULATION FOR LIQUID-LIQUID INTERFACIAL AREA PREDICTION IN ANNULAR CENTRIFUGAL CONTACTORS

摘要

A hybrid multiphase CFD solver which combines the Eulerian multi-fluid method with VOF sharp interface capturing has been developed for application to annular centrifugal contactors. This solver has been extended to enable prediction of mean droplet size and liquid-liquid interfacial area through a single moment population balance method. Simulations of liquid-liquid mixing in a simplified geometry and a model annular centrifugal contactor are reported with droplet breakup/coalescence models being calibrated versus available experimental data. Quantitative comparison is made for two different housing vane geometries and it is found that the predicted droplet size is significantly smaller for vane geometries which result in higher annular liquid holdup.