Combination of the contactless inductive flow tomography and the mutual inductance tomography for the flow visualization in a model of continuous casting


Combination of the contactless inductive flow tomography and the mutual inductance tomography for the flow visualization in a model of continuous casting

Wondrak, T.; Gerbeth, G.; Stefani, F.; Timmel, K.; Peyton, A. J.; Terzija, N.; Yin, W.

Continuous casting is a widely used technique in the steel producing industry today. The flow structure in the mold has a great impact on the quality of the produced steel. Open issues of this technology concern the influence of a two phase flow in the submerged entry nozzle and the influence of electromagnetic stirrers.

One possible technique to visualize the flow structure in electrically conducting melts is the contactless inductive flow tomography (CIFT) which is able to reconstruct the three-dimensional velocity field by measuring induced magnetic fields outside the melt. Since for thin slab casting the velocity in the mold can be assumed to be mainly two-dimensional it is sufficient to apply only one external magnetic field and to measure the induced fields at the narrow faces of the mold. The actual time resolution is about 1 Hz.

We will present the results [1,2] of an experiment with a two phase flow regime combining CIFT and the mutual inductance tomography to measure the flow structure in the mold and the gas/liquid distribution in the submerged entry nozzle. Additionally we show the effects of an electromagnetic stirrer around the submerged entry nozzle on the flow field in the mold.

[1] Th. Wondrak et al. (2010), Meas. Sci. Techn. 21, 045402
[2] N. Terzija et al. (2011), Meas. Sci. Techn. 22, 015501

Keywords: contactless inductive flow tomography; mutual inductance tomography; flow visualization; continuous casting

  • Lecture (Conference)
    Jahrestagung der Gesellschaft für angewandte Mathematik und Mechanik (GAMM 2011), 18.-21.04.2011, Graz, Österreich

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Publ.-Id: 15658