Dynamics of two-phase downwards flows in submerged entry nozzles and its influence on the two-phase flow in the mold

Ramos-Banderas, A.; Morales, R. D.; Sánchez-Pérez, R.; García-Demedices, L.; Solorio-Díaz, Gildardo

doi:10.1016/j.ijmultiphaseflow.2005.01.010

Cited by 52 publications

(37 citation statements)

References 17 publications

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“…In order to simulate turbulence, the standard k-ε model, Launder and Spalding [21] was used for this study as suggested by the multiphase flow studies of Ramos-Banderas et al [22] and [23]. The model is described by the following elliptic equations required as closure for the Reynolds Averaged Navier Stokes (RANS) equations:…”

Section: Turbulence Modelmentioning

confidence: 99%

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Abdulkadir

Hernández-Pérez

et al. 2015

Experimental Thermal and Fluid Science

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Section: Turbulence Modelmentioning

confidence: 99%

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Abdulkadir

Hernández-Pérez

et al. 2015

Experimental Thermal and Fluid Science

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“…Several water model experiments have been used to study the bubble size distribution in the SEN [3,4] or mold [5,6] after air is injected through the SEN. Bai and Thomas [3] studied the bubble formation during gas injection into turbulent downward-flowing water using high-speed camera; the effects of liquid velocity, gasinjection flow rate, injection hole diameter, and gas composition are investigated. Lee et al [4] used the water model to investigate initial bubble behavior in the SEN using specially-coated samples of porous with different permeability.…”

Section: Introductionmentioning

confidence: 99%

Population Balance Modeling of Polydispersed Bubbly Flow in Continuous-Casting Using Multiple-Size-Group Approach

Liu

et al. 2014

Metall Mater Trans B

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A population balance model based on the multiple-size-group (MUSIG) approach has been developed to investigate the polydispersed bubbly flow inside the slab continuous-casting mold and bubble behavior including volume fraction, breakup, coalescence, and size distribution. The Eulerian-Eulerian approach is used to describe the equations of motion of the two-phase flow. All the non-drag forces (lift force, virtual mass force, wall lubrication force, and turbulent dispersion force) and drag force are incorporated in this model. Sato and Sekiguchi model is used to account for the bubble-induced turbulence. Luo and Svendsen model and Prince and Blanch model are used to describe the bubbles breakup and coalescence behavior, respectively. A 1/4th water model of the slab continuous-casting mold was applied to investigate the distribution and size of bubbles by injecting air through a circumferential inlet chamber which was made of the specially-coated samples of mullite porous brick, which is used for the actual upper nozzle. Against experimental data, numerical results showed good agreement for the gas volume fraction and local bubble Sauter mean diameter. The bubble Sauter mean diameter in the upper recirculation zone decreases with increasing water flow rate and increases with increasing gas flow rate. The distribution of bubble Sauter mean diameter along the width direction of the upper mold increases first, and then gradually decreases from the SEN to the narrow wall. Close agreements between the predictions and measurements demonstrate the capability of the MUSIG model in modeling bubbly flow inside the continuous-casting mold.

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“…[3] With regard to the critical importance of the velocity structure in the mold, any kind of online flow monitoring would be highly desirable. The usual optical methods are restricted to water models of the process, [4][5][6] which are not adequate, however, when it comes to investigate steel/argon two-phase flows or the influence of magnetic fields. Unfortunately, even ultrasonic techniques are hard to apply to the real process because of the high temperature of the steel.…”

Section: Introductionmentioning

confidence: 99%

Combined Electromagnetic Tomography for Determining Two-phase Flow Characteristics in the Submerged Entry Nozzle and in the Mold of a Continuous Casting Model

Wondrak

Eckert

Gerbeth

et al. 2011

Metall Mater Trans B

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This article describes experiments on the combined determination of the distribution of liquid metal and argon in the submerged entry nozzle (SEN) and of the flow in the mold of a small-scale physical model of a continuous slab caster. For visualizing the metal distribution in the SEN, mutual inductance tomography (MIT) is applied, while the flow in the mold is determined by contactless inductive flow tomography (CIFT). The results of the latter are validated in part by ultrasonic Doppler velocimetry (UDV). Accompanying measurements provide information about the levels in the tundish and in the mold, as well as on the pressure in the SEN. Depending on the gas flow rate, various flow regimes are identified, among them pressure and mold level oscillations, transitions between double and single vortex flows, and transient single port ejections.

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Dynamics of two-phase downwards flows in submerged entry nozzles and its influence on the two-phase flow in the mold

Cited by 52 publications

References 17 publications

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Comparison of experimental and Computational Fluid Dynamics (CFD) studies of slug flow in a vertical riser

Population Balance Modeling of Polydispersed Bubbly Flow in Continuous-Casting Using Multiple-Size-Group Approach

Combined Electromagnetic Tomography for Determining Two-phase Flow Characteristics in the Submerged Entry Nozzle and in the Mold of a Continuous Casting Model

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