Modelling of Heat Transfer in Continuous Casting

Louhenkilpi, Seppo

doi:10.4028/www.scientific.net/msf.414-415.445

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…These include UBE's New Rheocasting (NRC) [1], Idra-Prince's Semi-Solid Rheocasting (SSR) [2], THT Presses' Sub-Liquidus Casting (SLC TM ) [3], and Alcan's Swirl Enthalpy Equilibration Device (SEED) [4], In 1967, Mizikar [6] introduced an approach that about the liquid metal and the mushy zone is raised by a quantity , and the heat transfer process does not occur when the A value is 1. This method of thermal conductivity is described with Equation 1 [7,8],…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study on the Steady Conduction Solution for Continuous Rheo-Casting for A356 Alloy

Duc¹,

Hai²,

Pham³

2017

Korean J. Met. Mater.

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Computational fluid dynamic modeling of a continuous rheo-casting technology was conducted, consistent with the manufacturing of 3 -thin plates made of aluminum alloy A356. The A numerical simulation on of the stabilizing time of the material crystallization was carried out using the ANSYS FLUENT code. Solidification and melting models were simulated with heat transfer and solid-liquid phase transformation involving the latent heat of crystallization were simulated. The calculated temperature distribution and the evolution of cooling rate through the material were examined and used to clarify their influence on microstructure, and further investigated with hardness testing. The thickness of the mushy zone was determined for the steady conduction solution of the continuous rheo-casting process. † (

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Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study on the Steady Conduction Solution for Continuous Rheo-Casting for A356 Alloy

Duc¹,

Hai²,

Pham³

2017

Korean J. Met. Mater.

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“…When A has the value of 1, the heat transfer is not increased. The effective thermal conductivity method can be described for example with equation 1 [3,4],…”

Section: Introductionmentioning

confidence: 99%

“…where k eff is the effective heat conductivity, f s is the solid fraction and A is a constant ranging from 1 to 12 2,3). The formulation for the effective heat transfer (eqn.1) might be different between models, but the principle remains the same [3,4]. (1) Even though this method has been widely used in heat transfer modelling [2,3,[5][6][7][8][9][10][11][12] of continuous casting of steel, only a few researchers [3,5,6,8] have questioned its accuracy.…”

Section: Introductionmentioning

confidence: 99%

The Effective Thermal Conductivity Method in Continuous Casting of Steel

Oksman¹,

Yu²,

Kytönen³

et al. 2014

ACTA POLYTECH HUNG

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The main concept of the effective thermal conductivity method is to include the effect of fluid flow in the heat transfer modelling by modifying the thermal conductivity of steel by a coefficient A to enhance the heat transfer in the liquid pool and the mushy zone in continuous casting. In this work, a case study comparison was conducted by calculating the actual flow field, heat transfer and solidification with a CFD model and comparing it with a model using the effect thermal conductivity method with A values ranging from 1 to 18. The objective of the study was to find out if the effective thermal conductivity can be used accurately to describe the effect of fluid flow and if so, which A values correspond to the CFD models results. The results indicate that the effective thermal conductivity method cannot be used reliably with constant A values: the best match in this study between the CFD model and the effective thermal conductivity method was with A value of 1 in the end of the strand and with values 9-18 in the mould area. It was concluded that main sources of inaccuracy in the effective thermal conductivity method were the use of constant A and the model's inability to take into account the increased heat transfer produced by the SEN. The authors suggest setting the coefficient A as a function of strand location in order to fix these inaccuracies in the effective thermal conductivity method for continuous casting of steel.

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