Computer analysis of molten steel flow and application to design of nozzles for continuous casting system

  • Arito Mizobe
  • Jouji Kurisu
  • Masanori Ueki


In steel continuous casting system, nozzles have an important role on the flow rate control of the molten steel and the elimination of the inclusions etc. Based on the fundamental principle of hydrodynamics, the optimal nozzle bore profile was determined for both tundish (TD) upper nozzle and submerged entry nozzle (SEN) with aiming to suppress the turbulence with high kinetic energy generated in the flow of the molten steel. A simulation by flow analysis using computational fluid dynamics (CFD) and a water model experiment were performed and clarified that the turbulence with high kinetic energy could be minimized in the nozzles with newly devised inner bore profile. The actual nozzle devised was manufactured and tested in the steel works with satisfying results. The adhesion of the alumina inclusions to the both nozzles is reduced by lowering the turbulent kinetic energy since the energy loss is minimized at the part. Both stability in the operation and quality of the steels have been brought by the present development.


1. Mizobe, A., Yasuda, T., Ueki, M. and Arimitsu, E., Optimum geometry of the tundish upper nozzle for the continuous casting of steel, Proc.MS&T '10, 2010, Huston, USA,pp.1727-1738.
2. Kuroda, T., Mizobe, A. and Kurisu, J., Flow optimization in the mould by port design improvement of submerged entry nozzle, Proc. UNITECR'11, 2011, Paper No.1-B2-16.
3. Hernandez, C. A., Barron, M.A and Miranda, R., Anchor-Shaped Design of a Submerged Entry Nozzle for the Continuous Casting of Steel, Open Journal of Applied Sciences, 2016, 6, 593-600.
4. Hernandez, C. A., Miranda, R. and Barron, M.A, Numerical Comparison of the Performance of Submerged Entry Nozzles for Slab Continuous Casting, Int'l Conf. Modeling, Sim. and Vis. Methods | MSV'16 |pp74-77.
5. Mohammadi-Ghaleni, M., Zaeem, M.A., Smith, J.D. and O'Malley R., Computational Fluid Dynamics Study of Molten Steel Flow Patterns and Particle-Wall Interactions Inside a Slide-Gate Nozzle by a Hybrid Turbulent Model, Metallurgical and Materials Transactions B, 47, Oct. 3056-3065 (2016).
6. Zhang, L. and Thomas, B. G., Application of Computational Fluid Dynamics to Steel Refining and Casting Processes, Fourth International Conference on CFD in the Oil and Gas, Metallurgical & Process Industries SINTEF / NTNU Trondheim, Norway 6-8 June 2005.
7. Al-Dhafeery, Y.R., Modeling of Argon-Molten Steel Flow in a Slab Continuous Caster by Discrete Phase Model, A thesis submitted to the degree of Masters of Engineering, McGill University, Montreal, April 2012
8. Mishra, P., Ajmani, S.K., Kumar, A. and Shrivastava, K.K., Review Article on Physical and Numerical Modelling of SEN and Mould for Continuous Slab Casting, International Journal of Engineering Science and Technology (IJEST), Vol. 4 No.05 May 2234-2243(2012)
9. Motaman, S., Mullis, A.M., Cochrane, R. F. and Borman, D. J., Use of Computational Modelling For Investigation the Effect of Melt Delivery Nozzle Tip Length on Gas Flow Separation in Supersonic Gas Atomization, ICLASS 2012, 12th Triennial International Conference on Liquid Atomization and Spray Systems, Heidelberg, Germany, September 2-6, 2012
10. Chatterjee, D., CFD Model Study of a New Four-Port Submerged Entry Nozzle for Decreasing the Turbulence in Slab Casting Mold, ISRN Metallurgy, Hindawi Publishing Corporation, Volume 2013, Article ID 981597, 6 pages,

11. Allen, P., Shields, C and Wilczynski, F., Optimisation of Nozzle Geometry in Bubbly Flow in
the Continuous Casting of Steel, CDT Fluid Dynamics, University of Leeds, Supervisors: Bokhove, O, Jones, C. Fairweather,M., and Smith, C (Materials Processing Institute)
12. Goldschmit, M.B., Ferro, S.P. and Mazzaferro, G., Numerical modeling of liquid steel flow with free surface, 4th. European Casting Conference, Birmingham, UK,. (2002).
13. Goldschmit, M. B., Ferro, S.P. and Owen, H.C., On the modeling of liquid steel processes, Latin American Applied Research, 32, 267-273(2002)
14. Chen, D.F., Jin, X., Zhang, D.J., Zhang, L.F., Xie, X., Zhang, X.G., Zhang, F.E. and Long, M.J., Water Model Simulation for Flow State in Slab Continuous Casting Mold, Materials Science and Technology (MS&T2009), Oct. 25-29, 2009, Pittsburgh, Pennsylvania, USA.
15. Halliday, I. M. D., Continuous Casting at Barrow, J. Iron and Steel Inst., 1959,Volume 191,No.2,
16. Morita, Z. and Adachi, A., A Consideration on Density and Viscosity of Fe-C System Molten
Alloys and Their Structural Modification(Structure and Physical Properties of Liquid Metals), Bussei-Kenkyu, 1970,Volume 15,No.2, pp. 64-72(in Japanese).(Compiled in KURENAI: Kyoto University Research Information Repository, )
17. Watanabe, K., Fluid Dynamics-Flow and Loss-, Fundamental Mechanical Engineering Course,
Maruzen, Tokyo, Japan, 2002, p.51 (in Japanese).
18. Nippon Steel Monthly, July 2004, pp5-8(in Japanese).
19. Mizobe, A., Thermal and Mechanical Stress Analyses on the Manufacturing and Application
Technology for the Refractory Materials, Doctor Thesis for Hokkaido University, Sapporo, June 2011, p.4 (in Japanese).
20. Thomas, B.G., Study of Transient Flow Structures in the Continuous Casting of Steel(1998-2001),
Final Report NSF Grant DMI-98-00274, Jan. 31, 2002.
21. Tomita, Y., Fluid Dynamics, Yokendo, Tokyo, Japan,1971, p.112, p.115 (in Japanese).
22. Yamane, R., Technology of Flow, Fundamental Mechanical Engineering Course, Maruzen, Tokyo,
Japan, 2003, p.76-78, (in Japanese).
23. Nakaoka, T., Agglomeration Simulation of Small Inclusion Particles in Molten Steel, R&D Kobe
Steel Engineering Reports, 2006, Volume 56, No.1, pp.40-43(in Japanese).
24. Higashitani, K., Yamauchi, K., Matsuno, Y. and Hosokawa, G., Turbulent Coagulation of
Particles Dispersed in a Viscous Fluid, J. of Chem. Eng. of Japan, 1983, Volume16, No.4, pp.299-304.
25. Taniguchi, S. and Kikuchi, A., Mechanisms of Collision and Coagulation between Fine Particles
in Fluid, Tetsu-to-Hagane(J. Iron and Steel Inst. Japan), 1992, Volume 78, No.4, pp.527-535
(in Japanese).
26. Shimasaki, S., Wada, T. and Taniguchi, S., Characteristics of Flotation, Sedimentation and
Entrainment of Particle in Agitated Liquid, Tetsu-to-Hagane, 2003, Volume 89,No.6,
pp.637-644(in Japanese).
27. Shimasaki, S., Wada, T. and Taniguchi, S., Slip Velocities of Solid Particles in Turbulently
Agitated Liquid, Tetsu-to-Hagane, 2004, Volume 90, No.8, pp.538-545(in Japanese).
28. Mukai, K., Tsujino, R., Sawada, I., Zeze, M. and Mizoguchi, S., Effect of Refractory Materials on
Inclusion Deposition of Immersion Nozzle in Continuous Casting and Mathematical Modeling
of Inclusion Deposition, Tetsu-to-Hagane, 1999,Volume 85,No.4, pp.307-313(in Japanese).
29. Tsukamoto, N., Takai, M., Nomura, O., Ogata, M. and Lin, W., Prevention of alumina clogging
in submerged entry nozzles, Shinagawa Technical Report, 2001,No.44,pp.27-38(in Japanese).
30. Colucci, P., Halloucherie, M., Leclercq, F., Verrelle, D.. Schiltz, C., Iida, E. and Nakamura, M.,
Improvement of meatllurgical qualities of florange steels by the use of mogul submerged entry
nozzles, Shinagawa Technical Report, 2008,No.51, pp.9-18.
31. Takahashi, S. and Yamauchi, T., Application of anti-clogging material for SEN ports,
Taikabutsu(Journal of Technical Association of Refractories, Japan(TARJ)), 2005,Volume
57,No.3, p.126(in Japanese).
32. Saito, M., Sorimachi, K., Sakuratani, T. and Kitano, Y., Effect of refractory materials on clogging
phenomena of immersion nozzle, CAMP-ISIJ, 1991,Volume 4,No.1,p.222(in Japanese).
33. Ogata, K., Hiraiwa, Y., Uchinokura, K., Hanagiri, S., Ohtsuka, Y. and Fujiwara, S., CaF2 addition
to zirconia-mullite-alumina-graphite submerged nozzle: A solution to avoid clogging,
Taikabutsu, 1993,Volume 45,No.11,p.638(in Japanese).
34. Nakamura, T., Takasu, T., Aoki, T. and Okumura, N., Effect of silica addition to anti-alumina
clogging material, Taikabutsu, 1991,Volume 43, No.3,pp.120-123(in Japanese).
35. Osanai, H., Hasunuma, J., Nabeshima, S., Park, H. K., Benson, P. M., and Shinryo, M.,
Developement of new carbon free submerged nozzle for prevent alumina clogging, CAMP-
ISIJ, 1997,Volume 10,No.1,p.177(in Japanese).
36. Yoshikawa, M., Ohtani, T., Ichikawa, K., Nakamura, R. and Uchida, S., Layer thickness to reduce
the thermal stress generated in multilayered submerged entry nozzles, Taikabutsu, 1996,
Volume 48,No.11,p.575(in Japanese).
37. Hata, M., Takahashi, S. and Uchida, K., The application results of spinel-graphte materials for
the submerged entry nozzle, Taikabutsu, 2002,Volume 54, No.9,pp.469-473(in Japanese).
38. Nomura, O., Izaiku, T., Uchida, S. and Lin, W., Hot face observation of spinel-C SEN used for
casting of high-oxygen steel, Taikabutsu, 2001,Volume 53,No.5,pp.304-305(in Japanese).
39. Mukai, K., Matsuoka, K., Wang, Z. and Lee, I., Influence of Ar gas injection on the involvement
of mold powder, CAMP-ISIJ, 1997,Volume 10,No.4,p.805(in Japanese).
40. Choudhary, S. K. and Khan, A. J., Nozzle clogging during continuous slab casting at Tata Steel,
Steel Times Int., 2000,Volume 24, No.3,pp.21-22,pp.24-25,p.28.
41. Yamada, Y., Tsutsui, Y. and Kanematsu, K., Evaluation method on alumina buildup of
submerged nozzle, Taikabutsu, 1993,Volume 45, No.3,pp.142-149(in Japanese).
42. Najjar, F. M., Finite-element modelling of turbulent fluid flow and heat transfer through
bifurcated nozzles in continuous steel slab casters, Proc. Electro. Furn. Conf., 1992,Volume 49,No.
43. Thomas, B.G. and Bai, H., Tundish nozzle clogging-Application of computational models, Proc.
Iron and Steel Society, 2001,No.18,pp.895-912.
44. Mizobe, A., Yasuda, T., Tsuduki, T., Kurisu, J. and Arimitsu, E., Improvement in adhesive
resistance of tundish upper nozzle by modifying the inner bore profile, Taikabutsu, 2011,
Volume 63,No.2,pp.65-72(in Japanese).
45. Mizobe, A. and Ueki, M., Inner bore profile of the tundish nozzle minimizing alumina adhesion,
Refractories Applications and News, 2011,Volume 16,No.2,pp.6-13.
46. Mizobe, A., Yasuda, T., Tsuduki, T., Kurisu, J. and Arimitsu, E., Determination of the optimal
inner bore profile to tundish upper nozzle for improvement in adhesive resistance by
computational fluid dynamics, Proceedings of the 93rd Meeting of Technical Committee on
Refractories for Casting, The Technical Association of Refractories, Japan, 2011,pp.57-70(in Japanese).
47. Mizobe, A., Yasuda, T., Tsuduki, T., Kurisu, J., Oki, K.and Arimitsu, E., New tundish nozzle
with the optimum bore profile,Proc. UNITECR'11, 2011,Paper No.2-A-1.
48. Spink, J., Carberry, M., Cassar, P., Mizobe, A., Yasuda, T. and Oki, K., Performance of a new
tundish nozzle at operation in a steel plant, Proc. UNITECR'11, 2011, Paper No.2-A-2.
49. Mizobe, A., Tachikawa, K., Kurisu, J. and Ueki, M., Novel design of submerged-entry nozzle
for steel continuous casting, AISTech-Iron and Steel Technology Conference Proceedings,
2017, pp.1989-2000.
50. Mizobe, A.,Kurisu, J., Furukawa, K., Tsuduki, T., Yamamoto, M., Oouchi, T. and Oki, K.,   Optimum quantity of gas blown into the bore of tundish upper nozzle, Proc. UNITECR'13 2013, pp.560-565.
Computer analysis of molten steel flow and application to design of nozzles for continuous casting system
How to Cite
MIZOBE, Arito; KURISU, Jouji; UEKI, Masanori. Computer analysis of molten steel flow and application to design of nozzles for continuous casting system. Application and Theory of Computer Technology, [S.l.], v. 2, n. 4, p. 36-64, may 2018. ISSN 2514-1694. Available at: <>. Date accessed: 16 jan. 2019. doi: