Effect of Argon Injection in Meniscus Flow and Turbulence Intensity Distribution in Continuous Slab Casting Mold Under the Influence of Double Ruler Magnetic Field

Sarkar, Sandip; Singh, Vikas K.; Ajmani, S. K.; Singh, Ranjay K.; Chacko, Elanjickal Zachariah

doi:10.2355/isijinternational.isijint-2017-448

Cited by 34 publications

(25 citation statements)

References 22 publications

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“…This ruler acts in several ways: stabilizing flow inside the nozzle, deflecting the jets exiting the ports downward, especially when the ruler is located just above the nozzle ports, which slows the flow up the narrow faces and finally by slowing the flow along the meniscus [29,[112][113][114]. The lower ruler generally tends to lessen the jet penetration depth [17,79,[114][115][116][117][118][119], which affects particle transport deep into the mold cavity, as discussed in Section 6.2.…”

Section: Double-ruler Embrmentioning

confidence: 99%

Electromagnetic Forces in Continuous Casting of Steel Slabs

Cho

Thomas

2019

Metals

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This paper reviews the current state of the art in the application of electromagnetic forces to control fluid flow to improve quality in continuous casting of steel slabs. Many product defects are controlled by flow-related phenomena in the mold region, such as slag entrapment due to excessive surface velocity and level fluctuations, meniscus hook defects due to insufficient transport of flow and superheat to the meniscus region, and particle entrapment into the solidification front, which depends on transverse flow across the dendritic interface. Fluid flow also affects heat transfer, solidification, and solute transport, which greatly affect grain structure and internal quality of final steel products. Various electromagnetic systems can affect flow, including static magnetic fields and traveling fields which actively accelerate, slow down, or stir the flow in the mold or strand regions. Optimal electromagnetic effects to control flow depends greatly on the caster geometry and other operating conditions. Previous works on how to operate electromagnetic systems to reduce defects are discussed based on results from plant experiments, validated computational models, and lab scale model experiments.

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Section: Double-ruler Embrmentioning

confidence: 99%

Electromagnetic Forces in Continuous Casting of Steel Slabs

Cho

Thomas

2019

Metals

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“…Non-uniform meshing is used for SEN-mold & sub-mold regions as depicted elsewhere. 15) Fine grid has been taken near the wall and SEN having more than 1.5 million cells. The discretized finite volume equations yield a set of linear simultaneous equations for all cells which is solved through a least-square cell method.…”

Section: Numerical Solution Proceduresmentioning

confidence: 99%

Mathematical Model and Plant Investigation to Characterize Effect of Casting Speed on Thermal and Solidification Behavior of an Industrial Slab Caster

Singh

Das

2018

ISIJ Int.

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“…In many cases a bubble size is chosen in combination with drag law to calculate the bubble motion. The bubble size is determined by either measuring the bubble size in an unscaled [7] or downsized water model; [8] observing or measuring the bubble distribution in a water model and choosing the bubble size in the simulation model that fits best to the experimental situation; [9] choosing the bubble size according to the solidified bubbles found in the cast metal; choosing the bubble size in a way that "a reasonable effect" by the gas bubbles on the flow can be obtained; [10] or choosing the bubble size without any experimental validation. [4] Alternatively, in some simulations the bubble drift velocity is specified without calculating the drift velocity during the simulation.…”

Section: Introductionmentioning

confidence: 99%

Bubbly Mold Flow in Continuous Casting: Comparison of Numerical Flow Simulations with Water Model Measurements

Javurek

Wincor

2020

steel research int.

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The impact on the mold flow of inert gas bubbles originating from a gas injection at the top of the submerged entry nozzle is investigated. Results from a physical model using water and air are compared with corresponding numerical flow simulation results. In numerical models, the bubble velocities are determined by calculating the force equilibrium between buoyancy, drag force, and other forces acting on the bubbles. For the observed bubble size in the physical model, the so‐determined rising velocity of the bubbles is significantly too high in comparison to the water model experiment. Various effects can influence the rising velocity of bubbles. One of them is that the presence of turbulence obviously reduces the rising velocity. The influence of turbulence models and of a turbulence‐induced bubble drag modification is analyzed in numerical flow simulations and compared to water model results.

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Effect of Argon Injection in Meniscus Flow and Turbulence Intensity Distribution in Continuous Slab Casting Mold Under the Influence of Double Ruler Magnetic Field

Cited by 34 publications

References 22 publications

Electromagnetic Forces in Continuous Casting of Steel Slabs

Electromagnetic Forces in Continuous Casting of Steel Slabs

Mathematical Model and Plant Investigation to Characterize Effect of Casting Speed on Thermal and Solidification Behavior of an Industrial Slab Caster

Bubbly Mold Flow in Continuous Casting: Comparison of Numerical Flow Simulations with Water Model Measurements

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