Numerical Simulation of Flow‐Induced Wall Shear Stresses in Three Different Shapes of Multi‐Strand Steelmaking Tundishes

Abstract

Tundish is an important vessel in the steelmaking circuitry where quality of steel can be optimized by carrying out various metallurgical operations. Nowadays, tundish is designed and operated to ensure maximum yield, superior cleanliness, and longer life. It is designed to operate at high temperatures and lined with different grades of expensive refractory materials. During casting process, lining material gradually erodes due to mechanical wear, chemical attack by slag, turbulent fluid flow, high temperature (creating softening), and thermal shock. In the present study, numerical investigations have been carried out to study the effect of three different tundish shapes (i.e., boat shape, T-shape, and V-shape) on flow-induced wall shear stresses. It has been observed that designs of tundish have significant role on fluid flow behavior and hence on development of shear stresses on the walls. It is seen that the front and bottom walls of T-shape tundish develops maximum wall shear stress. The back walls of T-shape tundish has least effect on flow-induced shear stress as compared to that of boat shape and V-shape tundish. Velocity vectors at different planes have been compared to justify the results. Average wall shear stress values were found to be maximum for V-shape tundish. Boat shape tundish exhibited minimum values of shear stress among the three different shape tundishes.

Effect of Port Angle of Sen on Melt Flow in a Mold

“…1 The vast application of steel makes it production process important aspect of study. [2][3][4][5] The cleanliness of steel is a most required process of industry. 6 Various methods have been used to enhance the properties of steel during solidification.…”

Two-Phase Numerical Modeling of Grade Intermixing in a Steelmaking Tundish

“…It has also been noted that at a low fraction of residual volume, kinetic energy formation was dominant in the inlet zone of the tundish because of inlet velocity, fluid shear, and friction. This phenomenon considerably enhances the inclusion formation in tundish [9]. In contrast to this, the magnitude of turbulent kinetic energy has been noted higher at the middle outlet and far outlet at tundish with APB because of fluid shear and viscous dissipation, as shown in Figure 5b.…”

“…The operating parameters of tundish and transient melt level in tundish has a major influence on intermixed grade melt. The shapes and sizes of tundish are varied according to the need of final product [6,7], however, the operating parameters such as inflow rate, residual volume, and outflow (throughput) rate, etc., have more influence on mixing of different grades during sequential casting [8][9][10]. The above parameters modify the melt flow structure inside the tundish.…”

Numerical Study on the Effect of a Novel Swirling Flow Generator for Submerged Entry Nozzle in Tundish

“…In this study, the standard k – ε two‐equation turbulence model is adopted, which has been widely applied and verified by water model during the simulations of the flow distribution in the tundish . The pressure and velocity were coupled by Simple C scheme and the PRESTO method was adopted to discretize the pressure.…”

“…Compared with the devices mentioned in the previous research works, the SFG designed in the current work is simple, durable, and replaceable device. The computational fluid dynamics (CFD) simulations were performed to investigate the flow pattern of the molten steel in the tundish, particularly the swirling flow pattern in the SEN, using the commercial software ANSYS FLUENT 18.0 in which the CFD simulation has been widely adopted to predict the flow pattern in the tundishes . The efficiency of the swirling flow generator was quantitatively described and discussed by a self‐defined parameter.…”