TY - JOUR
T1 - Large eddy simulations of double-ruler electromagnetic field effect on transient flow during continuous casting
AU - Singh, Ramnik
AU - Thomas, Brian G.
AU - Vanka, Surya P.
N1 - Funding Information:
The current study was supported by the National Science Foundation Grant CMMI 11-30882, and the Continuous Casting Consortium at the University of Illinois at Urbana-Champaign. The authors are also grateful to Mr. Jonathan Powers and Mr. Thomas Henry for making the Severstal casting facility at Dearborn, MI, USA, available for the experiments and for their help during the nail board measurements. The authors further acknowledge a grant from NVI-DIA for providing the Fermi GPU cards through the NVIDIA Professor Partnership program.
PY - 2014/6
Y1 - 2014/6
N2 - Transient flow during nominally steady conditions is responsible for many intermittent defects during the continuous casting of steel. The double-ruler electromagnetic field configuration, or "FC-Mold EMBr," is popular in commercial slab casting as it provides independent control of the applied static field near the jet and free surface regions of the mold. In the current study, transient flow in a typical commercial caster is simulated in the absence and in the presence of a double-ruler magnetic field, with rulers of equal strengths. Large eddy simulations with the in-house code CU-FLOW resolve the important transient behavior, using grids of over five million cells with a fast parallel solver. In the absence of a magnetic field, a double-roll pattern is observed, with transient unbalanced behavior, high surface velocities (0.5 m/s), surface vortex formation, and very large surface-level fluctuations (±12 mm). Applying the magnetic field suppresses the unbalanced behavior, producing a more complex mold flow pattern, but with much lower surface velocities (0.1 m/s), and a flat surface level with small level fluctuations (<±1 mm). Nail board measurements taken at this commercial caster, in the absence of the field, matched reasonably well with the calculated results, both quantitatively and qualitatively.
AB - Transient flow during nominally steady conditions is responsible for many intermittent defects during the continuous casting of steel. The double-ruler electromagnetic field configuration, or "FC-Mold EMBr," is popular in commercial slab casting as it provides independent control of the applied static field near the jet and free surface regions of the mold. In the current study, transient flow in a typical commercial caster is simulated in the absence and in the presence of a double-ruler magnetic field, with rulers of equal strengths. Large eddy simulations with the in-house code CU-FLOW resolve the important transient behavior, using grids of over five million cells with a fast parallel solver. In the absence of a magnetic field, a double-roll pattern is observed, with transient unbalanced behavior, high surface velocities (0.5 m/s), surface vortex formation, and very large surface-level fluctuations (±12 mm). Applying the magnetic field suppresses the unbalanced behavior, producing a more complex mold flow pattern, but with much lower surface velocities (0.1 m/s), and a flat surface level with small level fluctuations (<±1 mm). Nail board measurements taken at this commercial caster, in the absence of the field, matched reasonably well with the calculated results, both quantitatively and qualitatively.
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U2 - 10.1007/s11663-014-0022-2
DO - 10.1007/s11663-014-0022-2
M3 - Article
AN - SCOPUS:84902273683
SN - 1073-5615
VL - 45
SP - 1098
EP - 1115
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 3
ER -