Magnetohydrodynamic Calculation for Electromagnetic Stirring Coupling Fluid Flow and Solidification in Continuously Cast Billets

Dong, Qipeng; Zhang, Jiongming; Liu, Qiang; Yin, Yue

doi:10.1002/srin.201700067

Cited by 19 publications

(13 citation statements)

References 19 publications

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“…Trindade et al [18] investigated the solidification in the round billet continuous casting mold with M-EMS using the 3D coupled model of fluid flow, heat transfer and solidification, and concluded that a thinner shell close to the stirrer center and larger region of solid fraction in the billet center were produced by M-EMS. Dong et al [19] developed a 3D MHD model considering flow field and solidification in mold and investigated the interactive effect of fluid flow and magnetic field in the billet continuous casting mold. Maurya and Jha [20] numerically studied the effect of M-EMS position on fluid flow and solidification in a billet continuous casting mold and indicated that the stirrer position had a significant effect on the formation of the solidified shell.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Zhang

Luo

Chen

et al. 2019

Metals

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Electromagnetic stirring in mold (M-EMS) has been widely used in continuous casting process to improve the solidification quality of the steel strand. In the present study, a 3D multi-physical-field mathematical model was developed to predict the macro transport phenomena in continuous casting mold with M-EMS using ANSYS commercial software, and was adopted to investigate the effect of current intensity (0, 150, 200, and 240 A) on the heat, momentum, and species transports in the billet continuous casting mold with a size of 160 mm × 160 mm. The results show that when the M-EMS is on, the horizontal swirling flow appears and shifts the high-temperature zone upward. With the increase of current intensity, two swirling flows form on the longitudinal section of continuous casting mold and become more intensive, and the flow velocity of the molten steel at the solidification front increases. Thus, the wash effects of the fluid flow on the initial solidified shell become intensive, resulting in a thinner shell thickness at the mold exit and a significant negative segregation of carbon at the billet subsurface.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Zhang

Luo

Chen

et al. 2019

Metals

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“…In addition, some related thermophysical parameters were calculated by software JMatPro (Sente Software Ltd., Surrey, U.K.), and the others were derived from published literatures. 10,[27][28][29] The technological parameters and thermophysical parameters are listed in Table 5.…”

Section: Technological and Thermophysical Parametersmentioning

confidence: 99%

Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet

Sun

Bai

2021

ISIJ Int.

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A three-dimensional model, which coupled flow, heat transfer, solidification, solute transport and electromagnetic field, was separately developed for vertical mold and curved mold of billet continuous casting. Therefore, the characteristics and disciplinarians of macroscopic transport behavior for different types of mold were revealed. The influence of mold electromagnetic stirring (M-EMS) and mold curvature on the flow, heat transfer, solidification, solute transport in the mold were investigated in detail. The results indicate that the M-EMS can cause obvious rotating flow in the mold and enhance the superheat dissipation of the molten steel to promote the growth of solidification shell. The mold curvature has a profound effect on the flow field distribution of the mold, and further affects the temperature field and solute distribution in the mold. Therefore, the mold curvature is necessary to consider for predicting the macroscopic transmission phenomenon in the mold. Moreover, the predicted and experimental results for distributions of magnetic flux density and near surface element C content compare agreeably, which indicates the validity of the coupled model in current work.

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“…Ignorance of this modification would overestimate the melt flow. Dong et al [ 19 ] developed a magnetohydrodynamic model to investigate the effect of fluid flow on the magnetic field, induced current, and electromagnetic force. They found that the flow field in the mold has a certain influence on the magnetic field, the effect of fluid flow in M‐EMS calculation should not be ignored.…”

Section: Introductionmentioning

confidence: 99%

The Role of Mold Electromagnetic Stirring in the Dissipation of Superheat during the Continuous Casting of Billets

Zhang

et al. 2022

steel research int.

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Mold electromagnetic stirring (M-EMS), as an additional engineering measure, has been widely used to optimize fluid flow and heat transfer, and hence to control ascast structures and macrosegregation. [5][6][7][8][9][10][11] The swirling flow generated by M-EMS can effectively speed up the superheat dissipation in the mold region, and as a consequence, the equiaxed nuclei originating from crystal fragmentation or heterogeneous nucleation can survive the superheat and form the central equiaxed zone. [12,13] Due to the harsh environment and high cost of field experiments, numerical modeling has become an effective tool for investigating transport behavior with M-EMS. Yu et al. [14] developed a mathematical model to investigate the effect of M-EMS on the flow field, temperature profile, and inclusion trajectories in round billet continuous casting. They found that the core temperature was dramatically reduced with M-EMS. An et al. [15] proposed a 3D mathematical model to study the effect of current intensity and frequency on fluid flow, and the simulation results also indicated that M-EMS tends to accelerate superheat dissipation. However, solidification was ignored in the above studies.Ren et al. [16] developed a mathematical model to investigate the influence of M-EMS on fluid flow, heat transfer, and solidification in round bloom continuous casting. They found that M-EMS prevents the superheated jet from moving downward and thus accelerates superheat dissipation in the mold region. Li et al. [17] proposed a coupled magnetohydrodynamics (MHD) model to study the electromagnetic field, fluid flow, and solidification with M-EMS in bloom continuous casting. The maximum melt swirling flow velocity was found to be remarkably decreased when considering solidification. Meanwhile, the M-EMS-induced swirling flow was beneficial for preventing the superheated melt from moving down into the liquid core below. Trindade et al. [18] used a coupled numerical model to study the fluid flow, temperature distribution, and solidification of round billet continuous casting under M-EMS. They found that M-EMS tends to decrease the temperature in the strand center and locally reduce the shell thickness due to the increase in the tangential velocity close to the wall. However, common drawbacks of the previous models are as follows: 1) they used a relatively rough mixture-based model to study the solidification characteristics. The solid shell is simply calculated based on the lever rule, which omits some important

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Magnetohydrodynamic Calculation for Electromagnetic Stirring Coupling Fluid Flow and Solidification in Continuously Cast Billets

Cited by 19 publications

References 19 publications

Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Numerical Simulation of Fluid Flow, Heat Transfer, Species Transfer, and Solidification in Billet Continuous Casting Mold with M-EMS

Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet

The Role of Mold Electromagnetic Stirring in the Dissipation of Superheat during the Continuous Casting of Billets

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