Study on Mold Flux Entrapment by Numerical Simulation, Water Modeling, and High‐Temperature Quantitative Velocity Measurement

A mathematical model for tracking the mold flux entrapment (MFE), and mold flux droplet (MFD) movement and capture is established to investigate the influences of the casting speed (CS) and submerged entry nozzle side hole inclination angle (SEN‐SHIA) on MFE. The numerical simulation results of the surface velocity present excellent alignment with the high‐temperature measurement and water model experiment results, showing that the surface velocity increases as CS increases and decreases as SEN‐SHIA increases. The numerical simulation reveals three MFE mechanisms of vortex, shear force, and bubble, presenting excellent alignment with the observed results in the water model. When SEN‐SHIA is 15°, with increasing CS from 1.4 to 1.6 and 1.8 m min −1 , the mass of MFE within 40 s increases from 12.30 to 45.65 and 90.50 g. Among them, the mass of MFDs trapped by walls increases from 0.50 to 2.39 and 4.86 g. At CS of 1.8 m min −1 , with increasing SEN‐SHIA from 15° to 30° and 45°, the mass of MFE within 40 s decreases from 90.50 to 38.90 and 5.30 g. Among them, the mass of MFDs trapped by walls decreases from 4.86 to 1.94 and 0.05 g.