Submerged Entry Nozzle
Argon gas injection in the submerted entry nozzle prevents build up of alumina inclusions and also serves to trap particulate contaminants on the bubble surfaces as they rise to the meniscus. Full multi-fluid (multiphase) simulations are needed because of the large transfer of momentum between the gas and metal phases and the relatively long relaxation (equilibration) time of the bubbles. Gas injection can change the flow patterns within the mold significantly.
Liquid metal streamlines |
Volume fraction concentration |
Iso-surfaces of gas concentration |
ANSYS CFX analysis of gas injection in submerged entry nozzle
