Numerical analysis of influences of casting speeds on fluid flow in funnel shape mould with new type EMBr

Abstract In present work, a new type of magnet specially designed for the thin slab casting funnel shape mould is adopted. Numerical simulations of the new type electromagnetic brake (EMBr) influences on flow field are carried out. For the computation of magnetic fields, the software ANSYS with finite element method is adopted. For fluid flow, commercial software FLUENT with finite volume method is used to predict steel flow with EMBr, and magnetohydrodynamics model is activated to couple the applied magnetic and flow field. The variation of electromagnetic parameters are studied with the casting speed changing from 5 to 6 m min–1. The results show that, the flow field can be significantly controlled by the new type EMBr. Furthermore, an increase of ∼1000 A n ampere turns is needed to produce larger enough magnetic flux density in the mould region to control the fluid flow for every increment 0·5 m min–1 of casting speed.

[1]  R. Guthrie,et al.  Numerical study of coupled turbulent flow and solidification for steel slab casters , 1995 .

[2]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[3]  Xi-Yan Tian,et al.  Influences of casting speed and sen depth on fluid flow in the funnel type mold of a thin slab caster , 2007 .

[4]  Miss A.O. Penney.  (b) , 1974, The New Yale Book of Quotations.

[5]  W. Marsden.  I and J , 2012 .

[6]  Klaus Bremhorst,et al.  A Modified Form of the k-ε Model for Predicting Wall Turbulence , 1981 .

[7]  Arun S. Mujumdar,et al.  NUMERICAL HEAT TRANSFER: T.M. Shih Hemisphere. New York (1984) XVII+563 pp. , 1985 .

[8]  K. Fujisaki,et al.  Dual in-mold electromagnetic stirring in continuous casting , 2004, IEEE Transactions on Magnetics.

[9]  S. H. Seyedein,et al.  A three-dimensional simulation of coupled turbulent flow and macroscopic solidification heat transfer for continuous slab casters , 1997 .

[10]  Li Jianchao,et al.  Influence of electromagnetic brake on flow field of liquid steel in the slab continuous casting mold , 2008 .

[11]  W. Jones,et al.  The calculation of low-Reynolds-number phenomena with a two-equation model of turbulence , 1973 .

[12]  H. Saunders,et al.  Book Reviews : INTRODUCTION TO THE FINITE ELEMENT METHOD C. S. Desai and J. F. Abel Van Nostrand Rheinhold Co. , New York, N. Y. (1972) , 1975 .

[13]  Ben-Wen Li,et al.  Electromagnetic Brake Effects on the Funnel Shape Mold of a Thin Slab Caster Based on a New Type Magnet , 2009 .

[14]  W. Jones,et al.  The prediction of laminarization with a two-equation model of turbulence , 1972 .