Two-dimensional model for twin-roll continuous casting |
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Authors: | T Saitoh H Hojo H Yaguchi C G Kang |
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Affiliation: | (1) Department of Mechanical Engineering II, Tohoku University, 980 Sendai, Japan;(2) Department of Mechanical and Precision Engineering, Pusan National University, 30 Jangjeon-Dong, Dongnaeku, 607 Pusan, Korea |
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Abstract: | A numerical algorithm for the two-dimensional solidification problem in the twin-roll continuous casting system is presented
in this paper. Attention is focused on the elucidation of heat transfer and flow characteristics in both the liquid and the
solid phases. The present mathematical model can be applied to general full Navier-Stokes and energy equations, thereby covering
the wide range of twin-roll casting conditions. The boundary fixing method (BFM) is adopted to handle the moving boundary,
and the resultant transformed governing equations for the solid and liquid regions are solved separately by using a usual
explicit-type finite difference method. In this paper, a general numerical methodology is presented, and the quantitative
relationships between the important control parameters in continuous casting of twin-roll type (such as the roll speed, the
roll gap, the initial temperature of molten materials, the material properties, the solidification profile, and the endpoint
of solidification) are clarified in detail. The present numerical results have been compared with experimental results obtained
separately to check the validity of the proposed method. |
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