Simulation of fluid flow and solididification in the funnel type crystalizer of thin slab continuous cast

Hajisafari, Mahmoud; MAZARATAbAkI, M.

doi:10.13005/ojc/290408

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…The technique has been used to model the thermo-fluid phenomena in numerous application like bloom, 73) billet, 74) slab caster, 75) thin slab caster, 76) twin roll casting, 77) strip casting 78,79) etc. Thomas 1,[80][81][82] has pioneered the fluid flow and solidification calculations to validate and demonstrate the accuracy of such a mechanistic models.…”

Section: Shell Growth Through Solidificationmentioning

confidence: 99%

Thermo-fluid Mathematical Modeling of Steel Slab Caster: Progress in 21st Century

Singh

Das

2016

ISIJ Int.

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Interaction of solidified shell and fluid flow inside the mold cavity governs the quality in the continuous slab casting of steel. A careful mathematical model can reveal the phenomena at play to take corrective action for better quality and productivity of the caster. These phenomena include turbulent flow in the nozzle and mold, heat transfer and solidification, the transport of bubbles and inclusion particles, multiphase flow phenomena, the effect of electromagnetic forces, interfacial phenomena, interactions between the steel surface and the slag layers, the transport of solute elements and segregation etc. Substantial development has been done across the world in this direction during past few years. This paper reviews recent progress in modeling the thermo-fluid aspect of a steel caster.

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Section: Shell Growth Through Solidificationmentioning

confidence: 99%

Thermo-fluid Mathematical Modeling of Steel Slab Caster: Progress in 21st Century

Singh

Das

2016

ISIJ Int.

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“…The probabilities of fluctuatedmeniscus and swing circumfluence center position seemPossion distributions with the highest frequency near theaverage position [4]. By simulating the coupled fluid flow and solidification in the cold zone of thin slab caster, Zarea concluded that there were two reflux zones from the lower part and two vorticity zones from the upper part when the flow field was stable, and predicted the temperature and solid fraction in the mould pool by solving the verified fluid flow profile energy program [5]. Calderón-ramosstudied the liquid steel flow field of three kinds of SENs, and came to the conclusion that the orifice shape of the nozzle had a great influence on the liquid steel flow field in the nozzle [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of flow field of molten steel in the caster mould

Chen

et al. 2022

J. Phys.: Conf. Ser.

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In order to analyse the molten steel flow in the mould, a 2D model including the mould and the SENwas established. The fluctuation of molten steel on the meniscus of the mould and the steel flow velocity field in the mould and nozzle were analyzed. The calculation results show that: (1) the steel flow velocity field in the mouldwas the highest in the nozzle area. When liquid steel flows out of the SEN, its flow velocity decreases gradually. (2) There were three regions flow in the mould. There were two reflux areas outside the nozzle, the dividing line is the free surface, and the other reflux area is 0.2 m∼0.9 m. The liquid steel within 0.9 m∼1.5 m flows vertically downward. (3) The free surface near the nozzle is high, while the free surface away from the nozzle is low. The free surface is the lowest at 0.1 m and the highest at 0.06 m.

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“…The thin slab casting process is an example of the technological improvements in steel production; nevertheless, due to its high casting velocities and the small slab thickness, the liquid steel inside produces complex turbulent phenomena adversely affecting the final product quality. On this line, many researchers have focused their efforts on studying these turbulent phenomena, searching for a deeper understanding of how to control or eradicate them [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Some of the most commonly observed phenomena are asymmetries and oscillations of the flow patterns inside the mold, identified through mathematical simulations [2,4,5,7,10,11,[14][15][16][17][18][19] or by physical modeling [6,[9][10][11][12][13][15][16][17], formation of strong recirculation at each SEN side [7][8][9][10][11]…”

Section: Introductionmentioning

confidence: 99%

“…Some of the most commonly observed phenomena are asymmetries and oscillations of the flow patterns inside the mold, identified through mathematical simulations [2,4,5,7,10,11,[14][15][16][17][18][19] or by physical modeling [6,[9][10][11][12][13][15][16][17], formation of strong recirculation at each SEN side [7][8][9][10][11][12][13][14][15][16][17][18][19], meniscus fluctuations [8][9][10][11][12][13][14][15][16][17]19], meniscus vortex formation [10][11][12][17][18]…”

Section: Introductionmentioning

confidence: 99%

“…In this context, there is a great deal of detailed research about the stability of the meniscus [8,9,[11][12][13][15][16][17]19], the heat transfer and steel solidification affected by the flow patterns [7,8,14] and the jet oscillation frequency [2][3][4][5][6][9][10][11][12][13]18,19]. These works proposed and applied modifications to the process variables trying to control the turbulence intensity; the changes focus on the casting velocities [10,11,13,17,18], SEN immersion [10,11,13,[16][17][18], the mold shape and dimensions [6,14,15] and the geometry of the SEN [6,8,11,12,[14][15][16]18]. Solutes in liquid steel, like aluminum, react with oxygen when the bath is exposed to the atmosphere due to the flux opening, originating from the turbulence in the menis...…”

Section: Introductionmentioning

confidence: 99%

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Modeling Study of EMBr Effects on the Detrimental Dynamic Distortion Phenomenon in a Funnel Thin Slab Mold

et al. 2020

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The turbulent phenomena occurring in the thin slab mold affect the final product quality. Therefore, it is essential to carry out studies to understand and control their occurrence. Current research aims to study the electromagnetic brake (EMBr) effects on the flow patterns in a funnel thin slab mold. The objective is to prevent the detrimental phenomenon known as dynamic distortions (DD) of the flow, applying the EMBr in the typical horizontal position (H-EMBr) and a new vertical position close to the narrow faces (V-EMBr). The fluid dynamics are simulated using the Reynolds stress model (RSM), the Volume of Fluid (VOF) model and the Maxwell equations in their magnetohydrodynamics (MHD) simplification. The results show that the H-EMBr effectively counteracts the DD phenomenon by reducing the submerged entry nozzle (SEN) ports' mass flow rate differences. The EMBr reduces the highest meniscus fluctuations from −10 to ±3 mm with a field intensity of 0.1T and almost 0 mm for higher field intensities. In contrast, the V-EMBr configuration does not reduce or control at all the DD phenomenon, even though eliminating the upper roll flows does not diminish the meniscus fluctuation amplitudes and induces new small roll flows close to the SEN's wall.

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Simulation of fluid flow and solididification in the funnel type crystalizer of thin slab continuous cast

Cited by 8 publications

References 21 publications

Thermo-fluid Mathematical Modeling of Steel Slab Caster: Progress in 21st Century

Thermo-fluid Mathematical Modeling of Steel Slab Caster: Progress in 21st Century

Numerical simulation of flow field of molten steel in the caster mould

Modeling Study of EMBr Effects on the Detrimental Dynamic Distortion Phenomenon in a Funnel Thin Slab Mold

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