BK1-18 A Parametric Study of Entrainment Using CFD Simulations

K. J. Farrell

Accurate prediction of kettle entrainment is crucial for sizing kettles effectively, reducing equipment cost, and increasing column efficiency. Operating experience has informed the development of simple sizing rules. Two-phase CFD models can compute the amount of entrainment directly from the governing equations of motion. Two computational approaches are demonstrated: one uses an Eulerian-Lagrangian model, and the other uses an Eulerian multiphase model. The results indicate that Xist® accounts well for the elevated froth height in the CFD results. Trends with nozzle position and kettle diameter are as expected, but increased nozzle diameter exacerbated entrainment.