Numerical and Physical Parametric Analysis of a SEN with Flow Conditioners in Slab Continuous Casting Mold

Gonzalez-Trejo, Jesus; Real-Ramirez, Cesar Augusto; Miranda-Tello, José Raúl; Rivera-Perez, F.; Cervantes-de-la-Torre, Francisco

doi:10.1515/amm-2017-0136

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…The pool region reached 0.02 meters in height and the size of the vortex also increased and affected the position fluctuations at the same inlet velocity. It is worth noting that the internal flow behavior seen and measured in this work is consistent with the previously reported in literature [5,8,17].…”

Section: Analysis By Particle Image Velocimetrysupporting

confidence: 92%

“…As a consequence of the above behavior, the visualization of the process is performed in experimental facilities using water as the working fluid similarity criterion to obtain a scaled model of the system [3]. It is a frequent practice to reproduce the fluid dynamics within the mold using a scaled, physical model because of the reduced geometrical dimensions of the system and ambient temperature to prevent hazardous conditions during the process [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Three-dimensional, transient numerical simulations are used to complement the flow pattern observations and to study the fluid-structure interaction where the liquid steel passes. Other variable include the operating conditions, for example, the casting speed, which can be reproduced to understand the fluid dynamics phenomenon [5,[8][9][10][11][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Visualization and measurement of turbulent flow inside a SEN and off the ports

et al. 2021

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This work describes a visualization technique that allows to register and analyze flow inside a Submerged Entry Nozzle (SEN) model. The internal flow has a swirling pattern that produces characteristic flow conditions that can be used in efficiently supplying liquid steel from the tundish to the mold in the continuous casting process. The visualization method is a first step in analyzing the characteristics of the internal flow and hence in designing new SENs. A LED light source is employed to illuminate the SEN which reduces the reflections in the images. To enhance visualizations and measurements, a transparent cell consisting of a cubic volume with reduced dimensions was used to capture images from the high-speed camera and to record the flow pattern within the SEN. The SEN model consists of a vertical, constant diameter tube with two rounded exit ports located at the bottom with a downward angle of 15° each. The working fluid is water and reaches Re=10,000 within the cell. We also use the laser illuminated Particle Imaging Velocimetry (PIV) to calculate the velocity of fluid within the SEN and close to the exit ports. We confirm previously reported formation of three vortexes that interact with each other altering the swirl motion of the exit flow. Experimental results were compared with numerical simulations. The comparisons contribute to the validation of findings of Computational Fluid Dynamics (CFD) and Smoothed-Particle Hydrodynamics (SPH) results. Qualitative and quantitative similarities were found. Both physical and numerical results display a high turbulent flow behavior at the lower zone of the SEN. Experimental and numerical methods may be used together as a development method to measure and evaluate the characteristics of the flow behavior inside and outside the SEN model in order to design a better SEN to increase the quality of the steel slab.

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Section: Analysis By Particle Image Velocimetrysupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Visualization and measurement of turbulent flow inside a SEN and off the ports

et al. 2021

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“…During the continuous casting process, molten steel is continuously fed into a water‐cooled mold through a submerged entry nozzle (SEN), [ 1 ] generating a solidified shell thick enough to bear the static pressure of the molten steel. Subsequently, the strand is pulled into the secondary cooling zones by a dummy bar and cooled by water spray or air‐mist spray to solidify completely.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Fluid Flow, Heat Transfer, and Solidification in Ultrahigh Speed Continuous Casting Billet Mold

Zhang

et al. 2022

steel research int.

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Ultrahigh-speed casting is the most remarkable feature of billet high-efficiency continuous casting. The transient fluid flow, heat transfer, and solidification behavior under different casting speeds, submerged entry nozzle (SEN) parameters, and mold electromagnetic stirring (M-EMS) are investigated using a 3D transient mathematical model. The results show that a typical roll flow pattern is generated for all casting speeds, while a third small recirculation zone developed near the solidified shell at the casting speed of 6.0 m min À1 . When the casting speed increases, the impact depth of the molten steel increases from 0.748 to 0.844 m, the velocity and level fluctuation at the steel/slag interface increases, the high-temperature zone moves downward, and the shell thickness is reduced from 16.2 to 11.1 mm. As the SEN inner diameter and immersion depth increases, the impact depth increases, the velocity and level fluctuation at the steel/slag interface decreases, and the shell thickness at the mold exit is %11.0 mm. When the SEN immersion depth and inner diameter are 120 and 40 mm, respectively, the flow and temperature fields in the mold are the most appropriate. In addition, the M-EMS have a great effect on the fluid flow and heat transfer behavior.

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“…Therefore, as an initial step to further improve the steel flow performance in a mold, numerical and physical modeling has become a common way to study the multiphase flow phenomena under various conditions. Specifically, some factors that may affect the mold flow, such as the SEN (Submerged Entry Nozzle) type (straight or bifurcated) [1,2], SEN port design (shape, angle, thickness) [3][4][5][6][7][8][9][10], argon bubbles [11][12][13][14][15][16][17][18][19][20][21][22][23], SEN immersion depth [3,4,6,24], nozzle clogging [25], mold flow modifier [26], EMBr (electromagnetic braking) [13,14,[20][21][22][23][24][27][28][29][30] and M-EMS (mold electromagnetic stirring) [8][9][10]31], have been vastly investigated. Further improvements of the steel flow performance simply based on the parameter optimization become difficult.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Influence of a Swirling Flow Tundish on Multiphase Flow and Heat Transfer in Mold

Ersson

Jonsson

et al. 2018

Metals

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The effect of a new cylindrical swirling flow tundish design on the multiphase flow and heat transfer in a mold was studied. The RSM (Reynolds stress model) and the VOF (volume of fluid) model were used to solve the steel and slag flow phenomena. The effect of the swirling flow tundish design on the temperature distribution and inclusion motion was also studied. The results show that the new tundish design significantly changed the flow behavior in the mold, compared to a conventional tundish casting. Specifically, the deep impingement jet from the SEN (Submerged Entry Nozzle) outlet disappeared in the mold, and steel with a high temperature moved towards the solidified shell due to the swirling flow effect. Steel flow velocity in the top of the mold was increased. A large velocity in the vicinity of the solidified shell was obtained. Furthermore, the risk of the slag entrainment in the mold was also estimated. With the swirling flow tundish casting, the temperature distribution became more uniform, and the dissipation of the steel superheat was accelerated. In addition, inclusion trajectories in the mold also changed, which tend to stay at the top of the mold for a time. A future study is still required to further optimize the steel flow in mold.

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Numerical and Physical Parametric Analysis of a SEN with Flow Conditioners in Slab Continuous Casting Mold

Cited by 9 publications

References 15 publications

Visualization and measurement of turbulent flow inside a SEN and off the ports

Visualization and measurement of turbulent flow inside a SEN and off the ports

Numerical Simulation of the Fluid Flow, Heat Transfer, and Solidification in Ultrahigh Speed Continuous Casting Billet Mold

Numerical Study on the Influence of a Swirling Flow Tundish on Multiphase Flow and Heat Transfer in Mold

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