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.
其他摘要：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.
