Effect of Height and Position of Dams on Inclusion Removal in a Six Strand Tundish

Abstract

The Reynolds-averaged Navier-Stokes equations have been numerically solved to obtain a steady, threedimensional velocity field inside the six-strand billet caster tundish using the standard k-e model of turbulence. These steady flow fields so obtained are then used to predict the removal of inclusions from molten steel by solving the inclusion transport equation with the help of a commercial CFD software Fluent 6.1.22. The effects of height and position of dams in the tundish and size of the inclusion particles on percentage inclusion removal were studied. To simulate the chaotic effect of the turbulent eddies on the particle paths; a discrete random walk model was applied during inclusion trajectory calculations. The computational model was first validated with the results reported in the literature a good match was found between the two. It was found that with the increase in the height of the dams, the inclusion removal tendency increased whereas the shifting of the dams towards the outlets decreases the inclusion removal. An increase in the inclusion removal was found with an increase in the inclusion particle size.

Influence of Immersion Depth of Ladle Shroud in Liquid Steel on Range of the Transition Zone for One-Strand Tundish During Continuous Casting of Steel

“…For a computer simulation of the flow of liquid steel, we used Ansys-Fluent software (which applies the method of numerical integration based on the control volumes of the virtual models) [11]. A mathematical model of the flow of liquid steel in the tundish consists of a differential equation of continuity, momentum, and energy.…”

Physical and numerical modelling of a four-strand steelmaking tundish using flow analysis of different configurations

“…A large portion of the research has been focused on the use of flow control devices to alter flow patterns and improve the tundish performance by eliminating short-circuiting, increasing the residence time to promote inclusion removal, and reducing variation between strands in multi-strand tundishes (Craig et al, 2001(Craig et al, , 2003Kumar et al, 2007Kumar et al, , 2008Jha et al, 2008;Tripathi and Ajmani, 2011;Zhong et al, 2007). Craig et al (2001) worked on the optimization of a single-strand stainless steel caster tundish for two separate tundish configurations -dam and weir, and baffle with angled holes and an impact pad.…”

Flow Mechanism of Molten Steel in a Single-Strand Slab Caster Tundish Based on the Residence Time Distribution Curve and Data

“…It has been generally considered that physical and mathematical modelling is a powerful tool to simulate the molten steel flow in tundish to investigate its flow characteristics and get RTD curves with its corresponding data. Accordingly, the tremendous related studies on the method of hydrodynamic modelling, [4][5][6][7][8][9] which is based on the basis of similarity principles by using ambient temperature water to substitute for the molten steel, combined with mathematical simulation, [10][11][12][13][14][15][16] which is based on computational fluid dynamics (CFD) by using various sophisticated software.…”