Figure 5 - uploaded by Theeradech Mookum
Content may be subject to copyright.
Source publication
In this paper, we develop a mathematical model to study the coupled turbulent two-fluid flow and heat transfer process in continuous steel casting. The complete set of field equations are established. The turbulence effect on a flow pattern of molten steel and lubricant oil, meniscus shape and temperature field as well as solidifi-cation are presen...
Citations
... As industry development is moving toward casting thin steel plates, these problems, especially the problem of molten steel breakouts, are expected to become more and more critical to the success of the process. Over the last few decades, extensive studies have been carried out to model various aspects of the continuous casting process, in particular the heat transfer and steel solidification process Wu et al., 1994;Wu and Wiwatanapataphee, 2004), the electromagnetic stirring (Archapitak et al., 2004;Jenkins and Hoog, 1996;Kim et al., 2002;Li and Tsukihashi, 2001;Sivesson et al., 1998), the flow phenomena (Thomas, 1990, Wiwatanapataphee, 1998 and the formation of oscillation marks (Hill et al., 1999). However, as analyzed by Thomas (2001), the continuous casting process involves a staggering complexity of at least eighteen interacting phenomena at the mechanistic level. ...
In the continuous steel casting, an electromagnetic field, generated from the source current through the coil, is imposed to the system to control the fluid flow pattern and the steel solidification process. In this paper, we develop a mathematical model and numerical technique to study the coupled turbulent flow and heat transfer process in continuous steel casting under electromagnetic force. The complete set of field equations are established and solved numerically within the framework of the Galerkin finite element method. The influences of electromagnetic field on flow pattern of molten steel and temperature field as well as steel solidification are presented in the paper. It is found that the introduction of an electromagnetic field affects the flow field and temperature filed. In terms of the thickness of the solidified steel shell, the influence of electromagnetic field is very significant.
This paper presents a mathematical model and numerical technique for simulating the two-fluid flow and the meniscus interface movement in the electromagnetic continuous steel casting process. The governing equations include the continuity equation, the momentum equations, the energy equation, the level set equation and two transport equations for the electromagnetic field derived from the Maxwell’s equations. The level set finite element method is applied to trace the movement of the interface between different fluids. In an attempt to optimize the casting process, the technique is then applied to study the influences of the imposed electromagnetic field and the mould oscillation pattern on the fluid flow, the meniscus shape and temperature distribution.
