Numerical Analysis of Turbulence Inhibitor Toward Inclusion Separation Efficiency in Tundish

Mishra, Rishikesh; Mazumdar, Dipak

doi:10.1007/s12666-018-1547-x

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…However, heat losses exist throughout steel contact with the refractory walls, flow control devices, and even more from heat to heat. Because of that, in recent years, more researchers have considered the temperature variable in their simulations versus most previous works, which ignore their effects [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. Both approaches have generated debate about the importance of temperature on flow patterns among researchers [19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Gutiérrez,

Garcia-Hernandez,

Davila

et al. 2024

Fluids

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The continuous casting tundish is non-isothermal due to heat losses and temperature variation from the inlet stream, which generate relevant convection forces. This condition is commonly avoided through qualitative fluid dynamic analysis only. This work searches to establish the conditions for which non-isothermal simulations are mandatory or for which isothermal simulations are enough to accurately describe the fluid dynamics inside the tundish by quantifying the buoyant and inertial forces. The mathematical model, simulated by CFD software, considers the Navier-Stokes equations, the realizable k-ε model for solving the turbulence, and the Lagrangian discrete phase to track the inclusion trajectories. The results show that temperature does not significantly impact the volume fraction percentages or the mean residence time results; nevertheless, bigger velocity magnitudes under non-isothermal conditions than in isothermal conditions and noticeable changes in the fluid dynamics between isothermal and non-isothermal cases in all the zones where buoyancy forces dominate over inertial forces were observed. Because of the results, it is concluded that isothermal simulations can accurately describe the flow behavior in tundishes when the flow control devices control the fluid dynamics, but simulations without control devices or with a weak fluid dynamic dependence on the control devices require non-isothermal simulations.

show abstract

Section: Introductionmentioning

confidence: 99%

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Gutiérrez,

Garcia-Hernandez,

Davila

et al. 2024

Fluids

View full text Add to dashboard Cite

show abstract

“…However, heat losses exist throughout steel contact with the refractory walls, flow control devices, and even more from heat to heat. Because of that, in recent years, more researchers have considered the temperature variable in their simulations [1-26] versus most previous works, which ignore their effects [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. Both approaches have generated debate about the importance of temperature on the flow patterns among researchers [19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Gutiérrez,

Garcia-Hernandez,

Morales

et al. 2023

Preprint

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The continuous casting tundish is non-isothermal due to heat losses and temperature variation from the inlet stream generating relevant convection forces. This condition is commonly avoided through qualitative fluid dynamic analysis only. This work searches to establish the conditions for which non-isothermal simulations are mandatory or for which isothermal simulations are enough to accurately describe the fluid dynamics inside the tundish by quantifying the buoyant and inertial forces. The mathematical model, simulated by CFD software, considers the Navier-Stokes equations, the realizable k- model for solving the turbulence, and the Lagrangian discrete face to track the inclusion trajectories. The results show that temperature does not significantly impact the volume fraction percentages or the mean residence time results, nevertheless, bigger velocity magnitudes under non-isothermal conditions than in isothermal conditions and noticeable changes in the fluid dynamics between isothermal and non-isothermal cases in all the zones where buoyancy force dominates over inertial forces were observed. Because of the results, it is concluded that isothermal simulations can accurately describe the flow behavior in tundishes when the flow control devices control the fluid dynamic, but the simulation without control devices or with a weak fluid dynamic dependence on the control devices requires non-isothermal simulations.

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“…Yang et al [19][20][21] studied turbulence inhibitors with different structures, and analyzed the flow behavior, transfer behavior and inclusion field of molten steel by numerical simulation. The results showed that the square, round and straight shapes cannot affect the mixing dynamics of liquid steel, and the optimization effect of molten steel flow was not obvious.…”

Section: Introductionmentioning

confidence: 99%

Effect of Turbulence Inhibitors on Molten Steel Flow in 66-Ton T-Type Tundish with Large Impact Area

Yao

Wang

Zheng

et al. 2020

Metals

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A multiphase numerical simulation of the steel-slag flow was established by using the volume of fluid (VOF) model to study the effect of different turbulence inhibitors on the improvement of the steel-slag flow in the tundish. The steel-slag interface fluctuation was studied by vorticity magnitude and transient fluctuation change. A prediction model of residence time distribution (RTD) curve was established based on mathematical simulation and the error of prediction model can be controlled below 6% by comparing with the hydraulic results. The results show that jet flow into the tundish generated very different flow patterns. Case 1 produced a double-roll flow pattern and case 2 produced a four-roll flow pattern in the impact area. The ratio of vorticity magnitude above 1.00 s−1 near the ladle shroud was 2.60% in case 1 and the ratio of vorticity magnitude above 1.00 s−1 near the ladle shroud was 13.15% in case 2, which indicates case 2 increased the possibility of slag entrainment via the upward flow mechanism and shear layer instability. Surface velocity fluctuations in case 2 were much more severe near the ladle shroud. The thickness of the slag layer was 60 mm, the interface fluctuation towards surface in case 2 was close to 20 mm. Meanwhile, case 1 involved very small volume-fraction contours near interface. The turbulence inhibitor with internal ripples (case 1) showed a better optimization effect and the results could provide a theoretical basis for the selection of a suitable turbulence inhibitor for the 66-ton T-type tundish.

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Numerical Analysis of Turbulence Inhibitor Toward Inclusion Separation Efficiency in Tundish

Cited by 9 publications

References 10 publications

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Deeper Flow Behavior Explanation of Temperature Effects on the Fluid Dynamic inside a Tundish

Effect of Turbulence Inhibitors on Molten Steel Flow in 66-Ton T-Type Tundish with Large Impact Area

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