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Experimental and numerical investigation of the transient meniscus behaviour in a continuous caster

Experimental and numerical investigation of the transient meniscus behaviour in a continuous caster

Kountouriotis, Z., Pericleous, K. ORCID: 0000-0002-7426-9999, Djambazov, G. ORCID: 0000-0001-8812-1269, Domgin, J.F. and Gardin, P. (2011) Experimental and numerical investigation of the transient meniscus behaviour in a continuous caster. In: 7th European Conference on Continuous Casting (ECCC 2011), 27 June - 1st July 2011, Dusseldorf, Germany. (Unpublished)

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Abstract

This is a project to develop a dynamic CFD model of the continuous caster mould region with the aid of an
experimental water-model configuration. The emphasis will be on hydrodynamic aspects of the slag/steel interface
behaviour and in particular the effects of injected gas bubbles on interface stability. The model includes an improved implicit Counter Diffusion Method (CDM) interface-tracking scheme for numerical efficiency and a Lagrangian
representation of argon bubble tracks. In the water model, an oil layer is used to represent the slag. Qualitative
evaluation of the results against water model visualizations explains the main flow patterns observed, and validates the predicted deformation of the meniscus. Quantitative comparison against LDA velocity measurements is provided at seven measurement positions and the nature of observed wave action is analyzed by its spectral pattern. The dominant frequencies measured are correlated against the turnover time of the top and bottom recirculation regions in the caster for various SEN casting velocities and gas flow rates. The effect of gas is seen to have an important influence on the flowfield in general, but also on interface behaviour and on the frequencies observed. This influence is also seen in the case of a real industrial continuous caster, where velocity measurements and simulations show a change in the steel velocity pattern from a “single roll” to a “double roll” as the relative amount of gas increases.

Item Type: Conference or Conference Paper (Paper)
Additional Information: [1] Four international conferences under one roof: the 6th European Coke and Ironmaking Congress (ECIC), the 7th European Continuous Casting Conference (ECCC), the 4th International Conference on Modelling and Simulation of Metallurgical Processes in Steelmaking (STEELSIM) and the 1st International Conference on Energy Efficiency and CO2 Reduction in the Steel Industry (EECRsteel) - These events take place as accompanying congresses and conferences to the leading metallurgical trade fair (METEC trade fair & METEC InSteelCon 2011)[2] Paper presented as part of Track B Session 16
Uncontrolled Keywords: continuous casting, water model, multi-phase flow, moving interfaces
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis
School of Computing & Mathematical Sciences > Department of Mathematical Sciences
Related URLs:
Last Modified: 02 Mar 2019 15:52
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/6740

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