Simulation of transient fluid flow in mold region during steel continuous casting

R. Liu, B. G. Thomas, J. Sengupta

Research output: Contribution to journalConference article

Abstract

A system of models has been developed to study transient flow during continuous casting and applied to simulate an event of multiple stopper-rod movements. It includes four sub-models to incorporate different aspects in this transient event. A three-dimensional (3-D) porous-flow model of the nozzle wall calculates the rate argon gas flow into the liquid steel, and the initial mean bubble size is estimated. Transient CFD models simulate multiphase flow of steel and gas bubbles in the Submerged Entry Nozzle (SEN) and mold and have been validated with experimental data from both nail dipping and Sub-meniscus Velocity Control (SVC) measurements. To obtain the transient inlet boundary conditions for the simulation, two semi-empirical models, a stopper-rod-position based model and a metal-level-based model, predict the liquid steel flow rate through the SEN based on recorded plant data. Finally the model system was applied to study the effects of stopper rod movements on SEN/mold flow patterns. Meniscus level fluctuations were calculated using a simple pressure method and compared well with plant measurements. Insights were gained from the simulation results to explain the cause of meniscus level fluctuations and the formation of sliver defects during stopper rod movements.

Original languageEnglish (US)
Article number012015
JournalIOP Conference Series: Materials Science and Engineering
Volume33
Issue number1
DOIs
StatePublished - Dec 1 2012
Event13th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes, MCWASP 2012 - Schladming, Austria
Duration: Jun 17 2012Jun 22 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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