Modeling and Measurements of Multiphase Flow and Bubble Entrapment in Steel Continuous Casting

Jin, Kai; Thomas, Brian G.; Ruan, Xiaoming

doi:10.1007/s11663-015-0525-5

Cited by 50 publications

(80 citation statements)

References 33 publications

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“…Number of bubbles captured on each layer of center sample (left) and corresponding average diameter (right), where OR is outer radius and IR is inner radius. Reproduced with permission . 2016, TMS.…”

Section: Fluid Flow Modelingmentioning

confidence: 99%

“…Using flow fields obtained from both RANS and LES simulations, most of the small inclusions (92% of those <40 μm and 85% of those <80 μm) are found to be entrapped in the final product, as shown in Figure . Gas injection increases the removal rate (average number of inclusions removed per unit time) of small particles to the top surface slag layer .…”

Section: Fluid Flow Modelingmentioning

confidence: 99%

“…Gas injection increases the removal rate (average number of inclusions removed per unit time) of small particles to the top surface slag layer . Using an advanced capture criterion, only a very small fraction (<0.02%) of larger bubbles (>1 mm) are captured (Figure ) . The simple capture criterion greatly overpredicts the capture of large particles.…”

Section: Fluid Flow Modelingmentioning

confidence: 99%

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Review on Modeling and Simulation of Continuous Casting

Thomas

2017

steel research int.

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174

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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Section: Fluid Flow Modelingmentioning

confidence: 99%

Section: Fluid Flow Modelingmentioning

confidence: 99%

Section: Fluid Flow Modelingmentioning

confidence: 99%

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Review on Modeling and Simulation of Continuous Casting

Thomas

2017

steel research int.

Self Cite

174

115

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“…The simulation results were in good agreement with the experimental findings. Jin used a two‐way coupled Eulerian–Lagrangian model to investigated asymmetrical flow and the transport of argon gas bubbles . Liu performed an Eulerian–Lagrangian two‐way coupled simulations of gas–liquid two‐phase flow .…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation on the Two‐Phase Flow in a Water Model of Continuous Casting Strand with Gas Injection

Chen

Ren

Zhang

2018

steel research int.

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The Large Eddy Simulation (LES) turbulent model coupled with VOF multiphase model and Lagrangian Discrete Phase Model (DPM) is applied to investigate the gas–liquid two‐phase flow and bubble distribution. The drag force, lift force, virtual mass force, and pressure gradient force are incorporated in the current developed model, and the lift force is added via user defined subroutine. The influence of the drag force, the lift force, bubble size, and gas flow rate on the distribution of bubbles and flow field are investigated. The PIV measurements are employed to validate the mathematical model. The results show that the gas injection can affect the flow field and bubble behavior directly. The impingement point on the narrow face and vortex core of the upper recirculation zone moves upward with the increase of gas flow rate. The drag force has distinct influences on the bubble distribution and flow field. The interaction induced by the lift force cannot be ignored. Without the consideration of the lift force, a larger flow velocity will be predicted. Moreover, the lift force has significant effect on the bubble distribution at mold thickness direction, especially the larger bubbles.

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“…[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] Many previous works [13][14][15][16][17][18][19][20][21][22][23][24] have studied the capture of inclusions or bubbles by the solidifying shell in continuous casting. Yuan Q. et al 13) used a Lagrangian trajectory tracking method, coupling time-dependent flow fields obtained from large-eddy simulation (LES), to predict particle motion and capture in a thinslab steel caster.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Capture of Large Inclusion in Slab Continuous Casting with the Effect of In-mold Electromagnetic Stirring

et al. 2017

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Large inclusions captured by the solidifying shell deteriorate the surface quality of interstitial free steel. To investigate the capture of large inclusion in slab continuous casting, a three-dimensional model coupling flow field, solidification and inclusion motion has been developed. Additionally, to study the effect of in-mold electromagnetic stirring (M-EMS) on large inclusion capture, the electromagnetic field has been also coupled in the model. The results of electromagnetic field indicates its centrally symmetrical distribution on the cross-section, and the electromagnetic force swirls on the cross-section. The effects of M-EMS on flow pattern, solidification and inclusion capture have been discussed. The M-EMS significantly changes the flow pattern and solidifying shell thickness. The inhomogeneous distribution of large inclusions existing in the slab surface in the slab surface are different between the cases with and without M-EMS. Furthermore, the number of captured inclusions increases at 0-0.02 m beneath the wide surface and decreases at 0.02-0.04 m beneath the wide surface in response to the application of M-EMS. Large inclusions in steel were quantitatively analyzed by the galvanostatic electrolysis method. The experimental results are in agreement with the simulation results, suggesting that the model is valid.

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Modeling and Measurements of Multiphase Flow and Bubble Entrapment in Steel Continuous Casting

Cited by 50 publications

References 33 publications

Review on Modeling and Simulation of Continuous Casting

Review on Modeling and Simulation of Continuous Casting

Large Eddy Simulation on the Two‐Phase Flow in a Water Model of Continuous Casting Strand with Gas Injection

Numerical Study on the Capture of Large Inclusion in Slab Continuous Casting with the Effect of In-mold Electromagnetic Stirring

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