Transient Asymmetric Flow and Bubble Transport Inside a Slab Continuous-Casting Mold

Liu, Zhongqiu; Li, Baokuan; Jiang, Maofa

doi:10.1007/s11663-013-9972-z

Cited by 85 publications

(65 citation statements)

References 37 publications

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“…The turbulent flow of the molten steel can be obtained by solving the NavierStokes equation together with corresponding turbulence equations, while the trajectory of particles/ bubbles (or packets of particles/bubbles) are calculated by solving Newton's law for the motion of bubbles/particles considering their interaction with the turbulent melt flow. [5][6][7][8] The impact of bubbles on the transient, turbulent flow in a continuous caster for steel slabs 8 and bubble coagulation and breakup were also investigated by using this approach. 9 Recently, the current authors performed laboratory water-particle flow experiments to evaluate such a DPM model and discussed remarkable agreement between experiments and simulations.…”

Section: Motion Of Particles/bubblesmentioning

confidence: 99%

Simulation in Metallurgical Processing: Recent Developments and Future Perspectives

Ludwig

Kharicha

2016

JOM

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This article briefly addresses the most important topics concerning numerical simulation of metallurgical processes, namely, multiphase issues (particle and bubble motion and flotation/sedimentation of equiaxed crystals during solidification), multiphysics issues (electromagnetic stirring, electro-slag remelting, Cu-electro-refining, fluid-structure interaction, and mushy zone deformation), process simulations on graphical processing units, integrated computational materials engineering, and automatic optimization via simulation. The present state-of-the-art as well as requirements for future developments are presented and briefly discussed.

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Section: Motion Of Particles/bubblesmentioning

confidence: 99%

Simulation in Metallurgical Processing: Recent Developments and Future Perspectives

Ludwig

Kharicha

2016

JOM

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“…According to recent plant observations and detections, the distribution of argon bubbles and non-metallic inclusions captured by solidified shell in the rolled steel plates was intermittent and asymmetric; [8][9][10] suggesting that the fluid flow inside the mold was unsteady and instable. Several physical modeling studies 8,10,[11][12][13][14][15][16][17] have been carried out to reproduce the asymmetrical and oscillating fluid flow inside the casting mold.…”

Section: Introductionmentioning

confidence: 97%

“…Due to the high casting speed and high width to thickness ratio for thin slab caster, the molten steel flows inside the mold with intense turbulence. The turbulence flow [6][7][8] of molten steel plays a key role in slab quality since it influences the solidification procedure, mold powder entrapment and the floatation of non-metallic inclusions. Therefore, control and optimization of the turbulent flow play an important role in attaining a better product quality.…”

Section: Introductionmentioning

confidence: 99%

“…Several physical modeling studies 8,10,[11][12][13][14][15][16][17] have been carried out to reproduce the asymmetrical and oscillating fluid flow inside the casting mold. Gupta et al 11,12) found that the flow pattern in the lower recirculation zone of a traditional slab mold was asymmetric and oscillating about the central plane with a random period.…”

Section: Introductionmentioning

confidence: 99%

“…2, obtained from the k-ε model, the predicted flow pattern inside the present calculation mold was symmetric and stable, failure to explain the asymmetrical and oscillating fluid flow inside the mold. In recent studies, 8,10,22,23) the large eddy simulation (LES) has been successfully applied to obtain the transient asymmetrical flow inside the mold. Yuan et al 22) combined LES and particle image velocimetry (PIV) measurements in a scaled water model, finding good agreement between both types of data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Instability and Periodicity of Asymmetrical Flow in a Funnel Thin Slab Continuous Casting Mold

Liu

Tsukihashi

2015

ISIJ Int.

Self Cite

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Characteristics of the transient turbulent flow in a funnel thin slab continuous casting mold are studied using a large eddy simulation (LES) computational approach. Validations were done through comparison with previous experimental data of the mean velocities and the instantaneous velocities, and good qualitative and quantitative agreements are obtained. The turbulence flow inside the mold consists of various scales vortices; many pronounced large scale vortex structures were clear found inside the mold, containing various small scale vortices between them. The boundary shear flow can separate from the narrow wall and transport vorticity into the interior flow, and then possibly develop into a vortex. The intermittent chaotic vortex formation on both sides of the SEN is found at the meniscus. Three types of vortex phenomena are identified: one big vortex, two vortices and three small vortices. The positions and sizes are different, and the vortexes are located at the low velocity sides adjacent to the SEN. Significant asymmetry is seen in the instantaneous flow in the two halves of the thin slab mold cavity, especially in the lower recirculation zone. The periodical behavior of asymmetric flow inside the liquid pool was identified and characterized. The spectrum of velocities shows that the mean time interval for periodical changeover is 14.28 seconds.

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Review on Modeling and Simulation of Continuous Casting

Thomas

2017

steel research int.

183

115

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Continuous casting is a mature, sophisticated technological process, used to produce most of the world's steel, so is worthy of fundamentally-based computational modeling. It involves many interacting phenomena including heat transfer, solidification, multiphase turbulent flow, clogging, electromagnetic effects, complex interfacial behavior, particle entrapment, thermal-mechanical distortion, stress, cracks, segregation, and microstructure formation. Furthermore, these phenomena are transient, three-dimensional, and operate over wide length and time scales. This paper reviews the current state of the art in modeling these phenomena, focusing on practical applications to the formation of defects. It emphasizes model verification and validation of model predictions. The models reviewed range from fast and simple for implementation into online model-based control systems to sophisticated multiphysics simulations that incorporate many coupled phenomena. Both the accomplishments and remaining challenges are discussed.

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Transient Asymmetric Flow and Bubble Transport Inside a Slab Continuous-Casting Mold

Cited by 85 publications

References 37 publications

Simulation in Metallurgical Processing: Recent Developments and Future Perspectives

Simulation in Metallurgical Processing: Recent Developments and Future Perspectives

Instability and Periodicity of Asymmetrical Flow in a Funnel Thin Slab Continuous Casting Mold

Review on Modeling and Simulation of Continuous Casting

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