Numerical and Physical Simulation of Tundish Fluid Flow Phenomena

Odenthal, Hans-Jürgen; Böiling, Ralf; Pfeifer, Herbert

doi:10.1002/srin.200300160

Cited by 48 publications

(36 citation statements)

References 13 publications

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“…Former investigations [22] show that in geometrically similar models, the characteristic flow structures for Re > Re critical (Re critical = 2300) remain unchanged. Therefore, investigations with a reduced volume flow rate (Re = 4100) are carried out.…”

Section: Water Model Studymentioning

confidence: 92%

“…However, some investigations [25] demonstrate that this model does not give sufficient results for all cases. Former investigations [18,21,22,[26][27][28] showed that the overall flow phenomena in the tundish are well described by steady-state numerical simulations using the RANS equations combined with the realizable k-e model from Shih et al [29] This model is a good compromise between accuracy and simulation time. The realizable k-e model is based on the Boussinesq approximation, which says that the Reynolds stresses are a function of the mean gradients of velocity similar to the molecular stress.…”

Section: Mathematical Modelingmentioning

confidence: 96%

“…Because the internal flow structure is the main aspect of the investigation, the Froude number is neglected. [22] Regarding the Reynolds similarity criteria, the mass flow rate and the SEN inlet velocity increase in a reduced model. This increase leads to the occurrence of strong surface waves at the inlet range.…”

Section: Water Model Studymentioning

confidence: 99%

“…For the research project presented in this article, a 1:3-scaled water model tundish is used for the PIV measurements. [20][21][22] It can be operated with either an open or closed circuit. If the closed circuit is used, then the water will flow out of the tundish through the SENs, past the pump, flow meter, shroud, and back into the tundish.…”

Section: Water Model Studymentioning

confidence: 99%

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Numerical and Physical Modeling of Steel Flow in a Two-Strand Tundish for Different Casting Conditions

Braun

Warzecha

Pfeifer

2010

Metall Mater Trans B

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This article presents computational and water model studies of the three-dimensional turbulent fluid flow in a two-strand tundish for steady-state and transient casting conditions. First, it presents the flow field measurements obtained at a 1:3-scale water model of the tundish with the particle-image velocimetry (PIV) method during steady-state casting. The PIV measurements were performed using the Reynolds-similarity criterion. Thereafter, numerical simulation is carried out with the computational fluid dynamic software, FLUENT, using the realizable k-e turbulence model. The numerical model is validated using the measurement results obtained with the water model. The results of the numerical calculations are in good agreement with the PIV measurements. On this basis, the validated numerical model is adapted to simulate the 1:1-scale steel flow with boundary conditions that are derived from the real casting process. The nonisothermal, unsteady numerical calculations concerning the cooling process of steel melt inside the tundish are done for a 1:1-scale industrial facility-a 69-t two-strand tundish with a 380-t ladle. The influence of transient boundary conditions at the outlet of the tundish (one blocked strand) on the flow structure and mixing process of fluid during the casting process are investigated. The evaluation of the flow structure is performed using a zonal method, which relates the fluid flow with the mixing processes.

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Section: Water Model Studymentioning

confidence: 92%

Section: Mathematical Modelingmentioning

confidence: 96%

Section: Water Model Studymentioning

confidence: 99%

Section: Water Model Studymentioning

confidence: 99%

See 2 more Smart Citations

Numerical and Physical Modeling of Steel Flow in a Two-Strand Tundish for Different Casting Conditions

Braun

Warzecha

Pfeifer

2010

Metall Mater Trans B

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“…14) Q. Hou et al 15) have compared the standard and Renormalization group (RNG) 16) k-ε turbulence models in a case of swirling flow tundish. H. Odenthal et al [17][18][19] have used Realizable k-ε model 20) which is an advance model of standard k-ε model. They found good approximation by using RANS equation combined with the realizable k-ε model.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Turbulence Models for Prediction of Intermixed Amount with Free Surface Variation Using Coupled Level-Set Volume of Fluid Method

Siddiqui

Jha

2014

ISIJ Int.

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In continuous casting tundish steelmaking, old ladle is replaced by new one to ensure continuous supply of steel from tundish to mold. Bath height changes in case of ladle change-over. To bring the bath height level to normal height, the flow rate of liquid steel from the new ladle is increased. This has a direct bearing on the fluid flow pattern and resultant intermixed amount formed. In the present work, assessment of Reynoldsaveraged Navier-stokes (RANS) equations based standard k-ε, Renormalization group (RNG) k-ε, Realizable k-ε standard k-ω, and Shear-stress transport (SST) k-ω turbulence models have been carried out for prediction of free surface level of steel in tundish during ladle change-over and the intermixed amount formed. Coupled Level-Set Volume of Fluid (CLSVOF) method was used for free surface tracking in the three dimensional, multi-phase numerical model. Physical investigations were carried on water model setup of reduced scale tundish. Inflow rate of steel into the tundish from second ladle was varied due to which free-surface height of water varied and grade mixing in tundish was analyzed. Results obtained through physical investigations were compared with that of numerical investigations. The predictions revealed that RNG k-ε model have good approximation of F-curves as well as the interface between the two phases. Predictions made by all models except SST k-ω model have shown a satisfactory approximation with the experimental values. Free-surface interface profiles predicted by variants of k-ε models were seen to closely match with experimental data.

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Large Scale Oscillations in the Continuous Casting Process

Schwarze

Rückert

Leonhardt

et al. 2005

Proc Appl Math and Mech

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Synopsis: A study was made of non-metallic inclusions in medium or high carbon steel billets which were cast by the six strands S-type continuous casting machine of Kokura Works, Sumitomo Metal Ind., Ltd. The way of avoiding large silicate inclusions was also investigated. As the result, the reoxidation by air during casting was found to be detrimental in producing high quality steel grades by continuous casting. Many kinds of large silicates even if they are chemically unstable can exist in large quantity when the tundish stream was not protected from air. In order to avoid those silicates, it was shown that the oxygen content of the atmosphere around the stream must be maintained under 0.8%. The mechanism of the silicate formation and its growth are discussed on the basis of the test results.

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Numerical and Physical Simulation of Tundish Fluid Flow Phenomena

Cited by 48 publications

References 13 publications

Numerical and Physical Modeling of Steel Flow in a Two-Strand Tundish for Different Casting Conditions

Numerical and Physical Modeling of Steel Flow in a Two-Strand Tundish for Different Casting Conditions

Assessment of Turbulence Models for Prediction of Intermixed Amount with Free Surface Variation Using Coupled Level-Set Volume of Fluid Method

Large Scale Oscillations in the Continuous Casting Process

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