The application of the state-of-the-art turbulence models in the OpenFOAM CFD codes and the validation for different flow control cases in the continuous casting process

Abstract

Computational fluid dynamics (CFD) is an established approach to study flow behaviour. Despite advances in mathematical numerical modelling in recent decades, accurately predicting the turbulent flow behaviour of steel using CFD remains a challenge. In the continuous casting process, two main flow control systems are employed to transfer liquid steel from the tundish to the mould, namely stopper control and slide gate control. In additional to these two main flow control systems, the casting nozzle geometries, casting rate, and casting mould dimensions vary considerably, and this complexity makes it difficult to precisely simulate turbulent flow in the casting channel. In this paper, examples are presented showing how different turbulence models influence the simulation results, using the latest version of the open source CFD simulation software OpenFOAM. Prior to the CFD modelling, RHI Magnesita's water modelling facilities in Leoben (Austria) were used to validate the state-of-the-art turbulence models selected for a particular casting nozzle geometry and flow control system.

Keywords

computational fluid dynamics modelling water modelling flow control system continuous casting casting nozzle turbulence model

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References

Thomas

. Continuous casting, yearbook of science and technology. New York, USA: McGraw-Hill, 2004.

Feldbauer

Cramb

. In: 13th PTD Conf. Proc., ISS, Warrendale, PA, 1997, p.327.

Emling

Waugaman

. In: Steelmaking Conf. Proc., ISS, Warrendale, PA, 1994, p.371.

Kumar

Walker

Samarasekera

, et al. In: 13th PTD Conf. Proc., ISS, Warrendale, PA, 1997, p.119.

Torres-Alonso

Morales

Garcia-Hernandez

, et al.,. Influence of straight nozzles on fluid flow in mold and billet quality. Metall Mater Trans B 2008; 39B: 840.

Morales

. In: Proc. 15th Steelmaking Conf., Instituto Argentino de Siderurgia, Sn. Nicolás, Argentina, 2005, p.253.

Suzuki

Nakada

. Perspectives of research on high-speed conventional slabcontinuous casting of carbon steels,. ISIJ Int 2001; 41: 670.

Morales

R.D

Tang

Nitzl

, et al.. Design of a submerged entry nozzle for thin slab molds operating at high casting speeds. ISIJ Int 2012; 52: 1607.

Chaudhary

, et al. Transient turbulent flow in a liquid-metal model of continuous casting, including comparison of six different methods. Metall Mater Trans B 2011; 42B: 987.

10.

Kratzsch

, et al. URANS simulation of continuous casting mold flow: Assessment of revised turbulence models. Steel Res Int 2015; 86: 400.

11.

Chen

, et al. A mathematical modeling study of the influence of small amounts of KCl solution tracers on mixing in water and residence time distribution of tracers in a continuous flow reactor-metallurgical Tundish. Chem Eng Sci 2015; 137: 914.

12.

Durbin

. Advanced approaches in turbulence: theory, modeling, simulation, and data analysis for turbulent flows. 2021, Amsterdam, Netherlands, Elsevier Science, ISBN: 9780128207741.

13.

http://www.openfoam.com/documentation .

14.

Javurek

. Validierung von numerischen Strömungssimulationen des Stranggussprozesses an einem Wassermodell, Project Report July 2006. Linz, Austria: Johanes Kepler University, 2006.