摘要:Many quality problems that originate during continuous casting can be
directly attributed to poor control of fluid flow conditions, fluctuations on
flow rate from the ladle into the mold cavity and changes on nozzle exit port
flow patterns. The objective of this study is to characterize the dynamical
behavior of the mold Submerged Entry Nozzle (SEN) based on computational
models. The numerical results validation was performed by direct
comparison with experimental data. A commercial code based on the finite
volume method was used to solve this problem. The Large Eddy Simulation (LES)
turbulence model was used in this work. It was observed that numerical
solution is sensible to variations on solution method parameters and
modifications of the nozzle bottom geometry. For instance, when the
gradient calculation was based on the cell, the solution converges to a
stable stationary point. On the other hand, when the gradient calculation was
based on the node, the solution converges to a limit cycle. Additionally, it
was observed that slight variations in the nozzle pool geometry leads to
different mold entrance flow patterns.