Novel strategy to model deformation-induced strand contraction/dilatation during mechanical reduction

Guan, Rui; Rodrigues, Christian M. G.; Ji, Cheng; Zhu, Miaoyong; Li, Shengli; Wu, Menghuai; Kharicha, Abdellah; Vakhrushev, Alexander; Ludwig, Andreas

doi:10.1016/j.apm.2022.10.025

Cited by 2 publications

(1 citation statement)

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“…The impingement of the hot melt suppresses the growth or even leads to a partial remelting of the solidifying shell, thus, promoting a breakout formation [2,3]. The corresponding liquid pool depth affects the strand's contraction / dilatation under the supporting rolls and impacts solute distribution during the mechanical reduction [4]. The electromagnetic braking (EMBr) was under developed alongside with the casing technologies to become an efficient technique to control the mold flow [5].…”

Section: Introductionmentioning

confidence: 99%

Effects of the asymmetric and oscillating turbulent melt flow on the heat transfer and solidification inside the thin slab continuous casting (TSC) mold under the applied electromagnetic brake (EMBr)

Vakhrushev,

Karimi-Sibaki,

et al. 2024

J. Phys.: Conf. Ser.

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The thin slab casting (TSC) is a breakthrough near-net-shape technique for flat products accompanied by rapid casting and solidification rates. The TSC quality hinges on the turbulence, super-heat flow and growth of the solidified shell. The electromagnetic brake (EMBr) is commonly applied to control the fresh melt flow after feeding through a submerged entry nozzle (SEN). Numerical modelling is a perfect tool to investigate the multiphase phenomena in the continuous casting (CC). The presented study considers the heat transfer through the solid shell and water-cooled copper mold including the averaged thermal resistance of the slag skin and the air gap coupled with the turbulent flow and magnetohydrodynamics (MHD) model using an in-house code developed inside the open-source computational fluid dynamics (CFD) package OpenFOAM®. The model is applied to investigate different undesired asymmetric melt flow issues: (i) with the misaligned or (ii) partially blocked SEN; (iii) caused by the mean flow fluctuations with the natural frequencies; (iv) related to the oscillations of the fresh melt jets for the specific SEN designs and casting regimes. The variation of the flow pattern and superheat distribution is studied and presented for different scenarios both with and without applied EMBr.

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