In the metallurgy industry, thin slab continuous casting is commonly used in a number of production processes. Slab casting involves injection of molten metal through a Submerged Entry Nozzle (SEN) into a rectangular mould. At high casting rates characteristic of thin slab casting the SEN jet oscillates which can cause heat transfer and quality control problems. The following work presents Laser Doppler Anemometry (LDA) data from a 1/3 scale water model of the mould which characterises the jet oscillation by measurement of fluid velocity in a cross-flow region around the SEN. The results have shown the cross-flow to be highly transient with an oscillation period dependent on the casting rate of the system. Additional cross-flow which was also observed below the nozzle exit, allowed the jet to oscillate even with zero SEN-mould wall gap width.
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