Mathematical model for the twin roll type strip continuous casting of magnesium alloy considering thermal flow phenomena

A computer program has been developed to analyze the two-dimensional unsteady conservation equations for transport phenomena in the pool region of a twin roll strip casting in order to predict a velocity, temperature distributions of fields and a solidification process of molten magnesium. The energy equation of cooling roll is solved simultaneously with the conservation equations of molten magnesium in order to consider the heat transfer through the cooling roll. In this paper, it is examined the quantitative relationships of the important control parameters such as the roll speed, height of pool region, outlet size of nozzle, solidification profile and the final point of solidification in a twin roll strip casting. The finite difference method (2-D) and the finite element method (2-D) are used in the analysis of pool region and cooling roll to reduce computing time and to improve the accuracy of calculation, respectively.