Abstract
A numerical model is used to study the flow pattern in an immersion nozzle of a continuous casting mold with swirl flow imposed in the pouring tube. Comparison is made between the numerical results and those measured in a water model described in the preceding paper. The good comparison gives confidence in the model so that it can be extended to a more realistic steel system. The maximum velocity at the outlet of the nozzle with swirl is reduced significantly in comparison with that without swirl. In addition, the mechanism for obtaining the uniform velocity profile at the nozzle outlet was correlated with the flow pattern of the nozzle and the strength of the swirl. This is also done for a system in which swirl is generated by a rotating magnetic field imposed on the pouring tube. The model shows how the flow of steel form the nozzle may be modified using such a system. Such a swirling flow can provide a uniform, low velocity at the nozzle exit, which may be highly desirable for continuous casting purposes.
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