3-D CFD simulation of a vertical direct chill slab caster with a submerged nozzle and a porous filter delivery system

Begum, Latifa; Hasan, Mainul

doi:10.1016/j.ijheatmasstransfer.2014.01.072

Cited by 23 publications

(8 citation statements)

References 18 publications

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“…In this research, the treatment on the interaction of multiple physical fields is an intricate problem. To improve the convergence of the model and reduce the complexity of the multi-physics field, some hypotheses and simplifications are summarized as follows: The melt is regarded as an incompressible fluid and a Boussinesq approximation is applied for the thermal buoyancy (Lewis et al , 1996; Begum and Hasan, 2014). As the melt is taken as an incompressible fluid, the formation of solid shell due to solidification shrinkage is not considered. Solute field and meniscus shape are not considered in this model. Displacement current can be neglected because the displacement current is much lower than the conduction current owing to the perfect conductivity of molten metal (Yang et al , 2018).…”

Section: Model Descriptionmentioning

confidence: 99%

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Duan

Yin

Liu

et al. 2020

HFF

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Purpose The purpose of this paper is to investigate the effect of pulsed magnetic field (PMF) with different duty cycles on the melt flow and heat transfer behaviors during direct-chill (DC) casting of large-size magnesium alloy billet and find the appropriate range of duty cycle. Design/methodology/approach A transient two-dimensional mathematical model coupled electromagnetic field, flow field and thermal field, is conducted to study the melt flow and temperature field under PMF and compared with that under the harmonic magnetic field. Findings The results reveal that melt vibration and fluctuation are generated due to the instantaneous impact of repeated thrust and pull effects of Lorentz force under PMF. The peak of Lorentz force decreases greatly with the increasing duty cycle, but the melt fluctuation region is expanded with higher duty cycle, which accelerates the interior melt velocity and reduces the temperature gradient at the liquid-solid interface. However, PMF with overly high duty cycle has adverse effect on the melt convection and limited influence on the interior melt. A duty cycle of 20% to 50% is a reasonable range. Practical implications This paper can provide guiding significance for the setting of duty cycle parameters on DC casting under PMF. Originality/value There are few reports on the effect of PMF parameters during DC casting with applying PMF, especially for duty cycle, a parameter unique to PMF. The findings will be helpful for applying the external field of PMF on DC casting.

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Section: Model Descriptionmentioning

confidence: 99%

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Duan

Yin

Liu

et al. 2020

HFF

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“…Latifa Begum et al (2014) [6] have worked on the aluminium AA-1050 alloy and developed three-dimensional Computational fluid dynamics model for the study of heat transfer in the solidification and turbulent melt flow of vertical direct chill slab caster. Finally find out the result for velocity and temperature profiles local surface heat flux and sump depth.…”

Section: Review Criteriamentioning

confidence: 99%

Improving the Aluminium Rolling Ingot Recovery using Tqm Technique

Fegade*¹,

Tated²,

Nehete³

2019

IJITEE

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To improve productivity and profitability in Aluminium continuous casting industry the main action is to reduce losses due to defects resulting into revenue losses. Improving Rolling Ingot Recovery is possible by reducing the rejections & using the resources effectively (resources MAN, MACHINE, MATERIAL & CAPITAL) by applying TQM technique. This study presents a case about minimizing defects in aluminium continuous casting using Total Quality Management (TQM) techniques in which why-why analysis, Standard Operating Procedures (SOPs),and Cause and Effect analysis is used. It can be concluded from study that rejections, shell zone & inclusion can be reduced by, Continuous monitoring the health of the moulds, quality & quantity of water, the metal casting temperature, metal head in mould, water impingement angle, use of Ceramic foam filter plates, awareness & the adherence towards the guidelines

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“…All the appropriate variables of the transport equations in the nondimensional form are available in Table 3 in Ref. [14]. The non-dimensional form of the boundary conditions is also given in Eqs.…”

Section: Governing Equations For Turbulent Melt Velocity and Enthalpymentioning

confidence: 99%

“…(10)e(16) in Ref. [14]. In order to keep the article short, the non-dimensional transport equations and boundary conditions are not reported here.…”

Section: Governing Equations For Turbulent Melt Velocity and Enthalpymentioning

confidence: 99%

On numerical modeling of low-head direct chill ingot caster for magnesium alloy AZ31

Hasan

Begum

2014

Journal of Magnesium and Alloys

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A comprehensive 3D turbulent CFD study has been carried out to simulate a Low-Head (LH) vertical Direct Chill (DC) rolling ingot caster for the common magnesium alloy AZ31. The model used in this study takes into account the coupled laminar/turbulent melt flow and solidification aspects of the process and is based on the control-volume finite-difference approach. Following the aluminum/magnesium DC casting industrial practices, the LH mold is taken as 30 mm with a hot top of 60 mm. The previously verified in-house code has been modified to model the present casting process. Important quantitative results are obtained for four casting speeds, for three inlet melt pouring temperatures (superheats) and for three metal-mold contact heat transfer coefficients for the steady state operational phase of the caster. The variable cooling water temperatures reported by the industry are considered for the primary and secondary cooling zones during the simulations. Specifically, the temperature and velocity fields, sump depth and sump profiles, mushy region thickness, solid shell thickness at the exit of the mold and axial temperature profiles at the center and at three strategic locations at the surface of the slab are presented and discussed.

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3-D CFD simulation of a vertical direct chill slab caster with a submerged nozzle and a porous filter delivery system

Cited by 23 publications

References 18 publications

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Improving the Aluminium Rolling Ingot Recovery using Tqm Technique

On numerical modeling of low-head direct chill ingot caster for magnesium alloy AZ31

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