Fluid Flow, Heat Transfer, Mixing Time and Inclusion Motion in Molten Steel Continuous Casting Tundish

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-49 Number-4
Year of Publication : 2017
Authors : Abdelbagi Mohamed Abdalla, Omer Ahmad Altohami
DOI :  10.14445/22315381/IJETT-V49P236


Abdelbagi Mohamed Abdalla, Omer Ahmad Altohami "Fluid Flow, Heat Transfer, Mixing Time and Inclusion Motion in Molten Steel Continuous Casting Tundish", International Journal of Engineering Trends and Technology (IJETT), V49(4),231-243 July 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

The project of “Investigation to improve the secondary steel manufacturing process by adopting mathematical models“ was considered to contribute to the Strategic Steel Research in Sudan. The project was suggested as a close collaboration between Depart of mechanical engineering-University of Karrary and the steel factories in Sudan. Steel cleanliness, which is aim of this project, is a focal point for Sudan young steel industry in order to maintain and strengthen their in-market and global competitiveness. The steady velocity and temperature fields were obtained by computationally solving,the Reynolds-Averaged Navier-Strokes (RANS) equations together with the energy equation, using the standard k-? model of turbulence. These flow fields were then used to predict the inclusion removal by numerically solving the inclusion transport equation. For the mixing time characteristics transient solution was performed. The calculations were carried out using the commercial Computational Fluid Dynamics (CFD) software ANSYS-FLUENT 6.3.26. The models results were compared and validated with experiments results, plant measurements and models reported in the open literature. The predicted inclusion separation fractions to the top surface (slag) were compared and well agreed with the results from [1]& [2]. Also a change of the inlet position is compared due to inclusion removal and mixing time. The inclusion removal efficiency increases with an increase in the distance between the inlet gate and outlet gates. The mixing time spent was longer by the far inlet gate, which was explained the better inclusion removal efficiency. Temperature distribution analysis was performed under steady state conditions for the constant heat fluxes from walls and from free surface of the tundish. The computed temperatures fields of steel melt in the tundish interior were showed approximately equalized temperature distribution, which was agreed well with the results from [1]. The project findings considered as first step and intended to be hopefully applied in the steel factories in Sudan.


[1] T. Merder, J. Jowsa and A. Boguslawski, "The Analysis of the Conditions of Steel Flow in the Tundish Performed by a Numerical Methods," Archives of Metallurgy and Materials,pp. 933-953, Vol. 50, No. 4, 2005.
[2] S. Gupta and A. Dewan, "Performance Optimization of a Six-Strand Tundish," World Journal ofMechanics,doi:10.4236/wjm.2013.33018 Published Online June 2013 (http://www.scirp.org/journal/wjm, pp. 184- 193, 3, 2013.
[3] M. W. Czestochowa, " Numerical Modelling of Non-metallic Inclusion Separation in a Continuous Casting Tundish," Computational Fluid Dynamics Technologies and Applications. InTech, 2011.
[4] M. Warzecha , T. Merder and B. P. Warzecha, "CFD modelling of non-metallic inclusions removal process in the T-type tundis," Journal of Achievements in Materials and Manufacturing Engineering, Vol. 55, ISSUE 2, December 2012.
[5] Q. Hou and Y. You, "Comparison between standard and renormalization group k- ? models in numerical simulation of swirling flow tundish," ISIJ international, p. PP. 325 – 330, Vol. 45 (2005), No. 3.
[6] . A. Kumar, D. Mazumdar and S. C. Koria, "Modeling of Fluid Flow and Residence Time Distribution in a Four-strand Tundish for Enhancing Inclusion Removal," ISIJ International, p. pp. 38–47, Vol. 48 (2008), No.1.
[7] S. K. Mishra et al, "Numerical investigation of fluid flow and heat transfer in a multi-strand steelmaking tundish with closed strands," International Journal of Engineering Science and Technology (IJEST)3.2 (2011).
[8] . Chattopadhyay, Kinnor, Mihaiela Isac, and Roderick IL Guthrie "Physical and Mathematical Modelling of Steelmaking Tundish Operations: A Review of the Last Decade (1999–2009)," ISIJ International, p. pp. 331–348, Vol. 50 (2010), No. 3.
[9] H. Baiand and B. G. Thomas, "Two Phase Flow in Tundish Nozzles During Continuous Casting of Steel," in Materials Processing in the Computer Age III, V. Voller and H. Henein, eds., TMS Annual Meeting, Nashville, TN, Nashville, March 12-16, 2000.
[10] M. Warzecha, T. Merder, P. Warzecha and G. Stradomski, "Experimental and Numerical Investigations on Non-metallic Inclusions Distribution in Billets Casted at a Multi-strand Continuous Casting Tundish,"ISIJ international 53.11 (2013): 1983-1992.
[11] L. Zhang, "Fluid flow and heat transfer and inclusion motion in molten steel continuous casting tundishes," in Fifth International Conference on CFD in the Process Industries CSIRO, Melbourne, Australia, 13-15 December 2006.
[12] Y. Miki and B. G. Thomas, "Modeling of Inclusion Removal in a Tundish," Metallurgical and Materials Transactions B, pp. 639-654, Vol. 30, No. 4, 1999.
[13] A. Dewan and S. Gupta, "Comparison of Different Multi-Strand Tundishes,"" RESEARCH 2013 (ICMER 2013) (2014): 135.
[14] A. Braun, M. Warzecha and H. Pfeifer, "Numerical and Physical Modeling of Steel Flow in a Two-Strand Tundish for Different Casting Conditions," Metallurgical and Materials Transactions B, pp 549–559, June 2010, Volume 41, Issue 3.
[15] H. K. Versteeg and W. Malalasekera,, An Introduction to Computational Fluid Dynamics (The Finite Volume Method), Harlow: Pearson Education Limited, 2007.
[16] "Fluent, A. N. S. Y. S. "Fluent 6.3 Documentation."Fluent Inc., Lebanon, NH, 2006.
[17] B. E. Launder and D. B. Spalding, "Computer Methods App.," Mech. Eng., 3(2), 269-289, 1974.
[18] H. Turkoglu and B. Farouk, "Numerical computations of fluid flow and heat transfer in gas injected iron baths," ISIJ International, Vols. vol. 30, (11), pp.961-970, 1990.
[19] Ilegbusi, O., and J. Szekely. "The Physical and Mathematical Modeling of Tundish Operations."1989
[20] R. Codina, Comparison of some finite element methods for solving the diffusion-convection-reaction equation, Computer Methods in Applied Mechanics and Engineering, Volume 156, Issues 1–4, 14 April 1998, Pages 185-210
[21]Turbulence_Notes_Fluent-v6.3.06.pdf www.southampton.ac.uk/~nwb/lectures/GoodPractice CFD/Articles/Turbulence_Notes_Fluent-v6.3.06.pdf
[22] S. K. Ray, "On the Application of Physical and Mathematical Modeling to Predict Tundish Performance,"PhD Thesis, Montreal, Canada, August, 2009
[23] A. Prabhaka,CFD Analysis of Static Pressure and Dynamic Pressure for NACA 4412 ,International Journal of Engineering Trends and Technology (IJETT) - Volume4 Issue8- August, Page 3258 2013

Steel cleanliness; Tundish; Turbulent flow;Mixing time; Inclusion separation; Temperature distribution;Model validation;CFD.