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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

ANALYSIS OF CONTINUOUS CASTER FLOW PATTERN VARIATIONS RELATING TO ARGON INJECTION

Get access (open in a dialog) pages 923-934
DOI: 10.1615/TFEC2018.fip.021602

Resumo

Complex flow phenomena occurring within the mold region of a continuous caster (CC) result in the natural development of unsteady oscillating flow patterns, leading to increased internal and surface defects in solidified steel slabs. These unstable flow patterns are both fundamentally challenging and expensive to recreate through plant trials. However, computational fluid dynamics (CFD) modeling provides an alternative means to investigate flow instability and identify inefficiencies in current continuous casting processes. This work examines molten steel flows in a CC and the effect of argon injection on transient flow evolutions using the commercial code CD-adapco® STAR-CCM+®. Simulations were conducted with the unsteady k-omega shear stress transport (SST) turbulence model and the Eulerian-Eulerian multiphase model for argon-steel two-phase flows in the mold. The resultant flow characteristics were found to match closely with those calculated by ANSYS® Fluent® in the previous work, under the same casting conditions, and were validated against nail board test data. The findings demonstrated that the large-scale flow instabilities and the rate of roll oscillations within the mold region are affected by argon injection, and can become stabilized for certain injection rates of argon gas.