Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet

Abstract

A three-dimensional model, which coupled flow, heat transfer, solidification, solute transport and electromagnetic field, was separately developed for vertical mold and curved mold of billet continuous casting. Therefore, the characteristics and disciplinarians of macroscopic transport behavior for different types of mold were revealed. The influence of mold electromagnetic stirring (M-EMS) and mold curvature on the flow, heat transfer, solidification, solute transport in the mold were investigated in detail. The results indicate that the M-EMS can cause obvious rotating flow in the mold and enhance the superheat dissipation of the molten steel to promote the growth of solidification shell. The mold curvature has a profound effect on the flow field distribution of the mold, and further affects the temperature field and solute distribution in the mold. Therefore, the mold curvature is necessary to consider for predicting the macroscopic transmission phenomenon in the mold. Moreover, the predicted and experimental results for distributions of magnetic flux density and near surface element C content compare agreeably, which indicates the validity of the coupled model in current work.

Effect of casting speed on solidification and inclusion motions in bloom mold caster under the influence of in-mold electromagnetic stirring

“…The maximum MF is observed at the center of the stirrer on the surface of the bloom strand, which is 110.4 mT. The MF decreases gradually from the surface to the inside of the bloom strand in a radial direction (Li et al , 2021a). It was also observed that decreases on either side of the center of the stirrer in a longitudinal direction.…”

Numerical Simulation of Macrosegregation in a Continuous Casting Mold with Electromagnetic Stirring

“…The continuum model has been used to investigate macrosegregation in continuous casting through three-dimensional numerical simulation. [15][16][17][18][19][20] Chen et al 16) simulated and discussed the formation of center segregation in slab continuous casting. They concluded that center segregation occurred as a result of solute redistribution during solidification and the movement of the solidification front toward the slab's centerline.…”

Numerical Simulation for Magnetohydrodynamic Flow and Solidification in an Ultra-wide Slab Continuous Caster with Electromagnetic Stirring Roller

“…The effective viscosity ν eff is determined by the low Reynolds k-ε turbulence model. [17][18][19] Here, k is turbulent kinetic energy, ε is the dissipation rate of turbulent kinetic energy. Energy conservation equation…”