Numerical Simulation of Liquid Steel Flow in Wedge-type One-strand Slab Tundish with a Subflux Turbulence Controller and an Argon Injection System

2010 ◽  
Vol 81 (2) ◽  
pp. 123-131 ◽  
Author(s):  
A. Cwudziński
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Injection System ◽  
Argon Injection ◽  
Steel Flow

scholarly journals Experimental Methods of Validation for Numerical Simulation Results on Steel Flow through Tundish

2016 ◽  
Vol 61 (4) ◽  
pp. 2057-2060
Author(s):  
J. Pieprzyca ◽  
P. Warzecha ◽  
T. Merder ◽  
M. Warzecha
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Flow Distribution ◽  
Physical Modelling ◽  
Simulation Techniques ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
Steel Flow ◽  
Liquid Flows ◽  
The Impact

Abstract The article presents experimental results on the impact of tundish flow regulator influencing the liquid steel flow course. The research was conducted based on the hybrid modelling methods understood as a complementary use of Computational Fluid Dynamics (CFD) methods and physical modelling. Dynamic development of numerical simulation techniques and accessibility to highly advanced and specialized software causes the fact that these techniques are commonly used for solving problems related to liquid flows by using analytical methods. Whereas, physical modelling is an important cognitive tool in the field of empirical identification of these phenomena. This allows for peer review and specification of the researched problems. By exploiting these relationships, a comparison of the obtained results was performed in the form of residence time distribution (RTD) curves and visualization of particular types of liquid steel flow distribution zones in the investigated tundish.

scholarly journals Numerical Modelling of Fluid Flow and Thermal Phenomena in the Tundish of CSC Machine

2014 ◽  
Vol 14 (1) ◽  
pp. 103-106 ◽  
Author(s):  
L. Sowa
Keyword(s):  
Numerical Simulation ◽  
Flow Control ◽  
Liquid Steel ◽  
Metal Flow ◽  
Temperature Fields ◽  
Cast Slab ◽  
Flow Control Devices ◽  
Steel Cast ◽  
Control Devices ◽  
Steel Flow

Abstract The mathematical and numerical simulation model of the liquid steel flow in a tundish is presented in this paper. The problem was treated as a complex and solved by the finite element method. The single-strand slab tundish is used to continuous casting slabs. The internal work space of the tundish was modified by the following flow control devices. The first device was a striker pad situated in the pouring tundish zone. The second device was a baffle with three holes and the third device was a baffle without hole. The main purpose of using these devices was to cause a quiet liquid mixing as well as give directional metal flow upwards which facilitated inclusion floatation. The interaction of flow control devices on hydrodynamic conditions was received from numerical simulation. As a result of the computations carried out, the liquid steel flow and steel temperature fields were obtained. The influence of the tundish modification on velocity fields in the liquid phase of steel was estimated, because these have an essential influence on high quality of a continuous steel cast slab.

Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll Devices

2011 ◽  
Vol 56 (3) ◽  
pp. 611-618 ◽  
Author(s):  
A. Cwudziński
Keyword(s):  
Numerical Simulation ◽  
Liquid Steel ◽  
Flow Reactor ◽  
Control Device ◽  
Discrete Phase Model ◽  
Internal Working ◽  
Working Space ◽  
Metallic Inclusions ◽  
Discrete Phase ◽  
Steel Flow

Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll DevicesAn effective refining of liquid steel can be carried out either in a tundish or in the mould of a CSC machine. Being a flow reactor, the tundish performs the function of a link between the steelmaking ladle and the mould. Owing to this fact, the liquid steel resides in the tundish for a specific time, which enables the tundish to be used for refining purposes. For modification oftundish internal working space, two types of flow control device (FCD), namely a ceramic gas-permeable barrier and a subflux turbulence controller (STC), were proposed. For simulation of movement of gas phase and non-metallic inclusions, a discrete phase model was used. The obtained results unambiguously indicate which of the proposed tundish equipment configurations will be more advantageous for intensifying the process of liquid steel refining from NMIs.

Physical and mathematical modeling of bubbles plume behaviour in one strand tundish

2017 ◽  
Vol 115 (1) ◽  
pp. 101 ◽  
Author(s):  
Adam Cwudziński
Keyword(s):  
Mathematical Modeling ◽  
Numerical Simulations ◽  
Liquid Steel ◽  
Injection System ◽  
Water Model ◽  
Argon Flow Rate ◽  
Permeable Barrier ◽  
Argon Injection ◽  
Physical And Mathematical Modeling ◽  
Laboratory Water

Moving through the liquid steel, argon bubbles intensify the chemical and thermal homogenisation processes and liquid metal refining. The present study reports the physical and mathematical modeling of bubbles behaviour in the tundish with argon injection system. The 210 litre–capacity one strand slab tundish model was made on a scale of 2:5. The laboratory water model experiments have demonstrated that the identical porous material used in gas-permeable barrier may generate gas bubbles varying in size and shape. This fact will also affect both vertical and horizontal velocities attained by the bubbles. From numerical simulations influence of argon flow rate on liquid steel velocity for free surface in the tundish was obtained. The results from numerical simulations  indicate that argon create increasing of liquid steel velocity and vortex structures.

scholarly journals Effects of Multiple-Hole Baffle Arrangements on Flow Fields in a Five-Strand Asymmetric Tundish

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5129
Author(s):  
Binglong Zhang ◽  
Fuhai Liu ◽  
Rong Zhu ◽  
Jinfeng Zhu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Residence Time ◽  
Liquid Steel ◽  
Flow Fields ◽  
Average Residence Time ◽  
Injection Angle ◽  
Uniform Rate ◽  
Modelling Experiment ◽  
Steel Flow

This paper reports on the re-engineering of standard five-strand tundish designs into a five-strand asymmetric tundish, which resulted in a non-uniform rate and bias for each strand. We sought to improve the casting conditions by optimizing the liquid steel flow-field in the tundish. Both a water modelling experiment and a numerical simulation were performed to analyze the flow-field according to various diversion hole diameters and injection angles. The results showed that the average residence time decreased as the diameter of the diversion holes increased. As the injection angle was increased, the average residence time initially decreased and then increased. The liquid steel from the ladle shroud rapidly extended to the #2 and #3 strands in the original tundish, which reduced the likelihood of inclusion collision and coalescence.

Numerical Simulation of the Molten Steel Flow in the Tundish of CSC Machine / Symulacja Numeryczna Przepływu Ciekłej Stali W Kadzi Pośredniej Urządzenia COS

2012 ◽  
Vol 57 (4) ◽  
pp. 1163-1169 ◽  
Author(s):  
L. Sowa ◽  
A. Bokota
Keyword(s):  
Numerical Simulation ◽  
Flow Control ◽  
Liquid Steel ◽  
Metal Flow ◽  
Velocity Fields ◽  
Temperature Fields ◽  
Cast Slab ◽  
Flow Control Devices ◽  
Control Devices ◽  
Steel Flow

The mathematical and numerical simulation model of the liquid steel flow in a tundish is presented in this paper. The problem was treated as a complex one. The velocity fields are obtained by solving the momentum equations and the continuity equation, whereas the thermal fields are calculated by solving the conduction equation with the convection term. One takes into consideration in the mathematical model the changes of thermophysical parameters depending on the temperature. The problem was solved by the finite element method. The one-strand slab tundish is used to casting slabs. The internal work space of the tundish was modified by flow control devices. The first device was a striker pad situated in the pouring tundish zone. The second device was a baffle with three holes. The main purpose of using these was to put barriers in the steel flow path as well as give directional metal flow upwards which facilitated inclusion floatation. The visualization of interaction of flow control devices on hydrodynamic conditions was received from numerical simulations. As a result of the computations carried out, the liquid steel flow and steel temperature fields were obtained. The influences of the tundish modifications on the velocity fields in liquid phase of the steel were estimated, because these have essential an influence on high-quality of a continuous steel cast slab.

scholarly journals Interaction of Liquid Steel with Mould Flux in Continuous Casting Bloom Mould - Numerical Simulations and Industrial Experiences

2016 ◽  
Vol 61 (4) ◽  
pp. 2013-2020 ◽  
Author(s):  
A. Cwudziński ◽  
J. Jowsa ◽  
P. Przegrałek
Keyword(s):  
Numerical Simulation ◽  
Computer Simulation ◽  
Continuous Casting ◽  
Cross Section ◽  
Liquid Steel ◽  
Virtual Model ◽  
Ansys Fluent ◽  
Vof Model ◽  
Mould Flux ◽  
Steel Flow

Abstract The device under examination is a mould of a capacity of 0.5 Mg and with inner cross-section of 280×400 mm. The virtual model of the facility under investigation was made using Gambit, DesignModeler and Meshing programs. Computer simulation of the liquid steel flow and mould flux behaviour in turbulent motion conditions was done using the Ansys-Fluent® computer program. On the basis of earlier researches the volume of fluid (VOF) model was applied. Based on computer simulations carried out, steel flow and flux behaviour fields and curves of flux mould entrainment concentration were obtained. The results obtained from numerical simulation were compared with the data obtained during bloom casting under industrial conditions. Based on the obtained information on the interaction of steel with mould flux, the region was determined, in which conditions likely to favour the entrainment of slag portions into the forming bloom exist.

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