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Numerical simulation of induction stirred ladle
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2006 (English)In: Proceedings of the COMSOL User´s Conference 2006 Birmingham, 2006Conference paper, Published paper (Refereed)
Abstract [en]

Induction ladle plays an important role in a broad range of metal-processing operations. The treatment of steel in the ladle is as old as the use of ladles in steelmaking. The main purpose for ladle treatment of hot metal and liquid steel include desulphurization, deoxidation, alloying, and inclusion shape control. Over last few years efforts are made to develop simulation models of induction ladle [1]-[8], in order to study heat transfer and fluid flow in gas and induction stirred ladles. These models provide more information about the industrial processes used in ladle treatment of steel. In this paper a simulation model of a laboratory scaled induction ladle is presented. The simulation model so developed will make it feasible to have information about the fluid flow phenomenon and thermal heat transfer. In order to perform the numerical simulation of the furnace, physical processes involved are expressed as a coupled-nonlinear system of partial differential equations arising from a thermal-magneto-hydrodynamic problem. The simulation model is formulated in a twodimensional domain. The equations of electromagnetic model to describe magnetic diffusion inside the ladle through magnetic stirrer are expressed by well known system of Maxwell’s equations. Moreover, the heat equations governing the induction heating are provided. The hydrodynamic model for fluid flow in the molten metal is described by wellknown incompressible Navier-Stokes equation.Numerical simulation are performed by solving the coupled system of equations using the commercial software COMSOL Multiphysics® application mode by combining Electromagnetics, Fluid Dynamics and Heat transfer modules.

 

Place, publisher, year, edition, pages
2006.
Keyword [en]
induction ladle, induction heating, electromagnetic forces, Maxwell´s equations, Navier-Stokes equations
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-97893OAI: oai:DiVA.org:kth-97893DiVA: diva2:534120
Note
QS 2012Available from: 2012-06-15 Created: 2012-06-15 Last updated: 2012-06-15Bibliographically approved
In thesis
1. Modeling of induction stirred ladles
Open this publication in new window or tab >>Modeling of induction stirred ladles
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Over the years numerous computational fluid dynamics models have been developed in order to study the fluid flow in gas and induction stirred ladles. These models are used to gain insight in the industrial processes used in ladle treatment of steel. A unified model of an induction stirred Ladle in two and three dimensions is presented. Induction stirring of molten steel is a coupled multi-physics phenomena involving electromagnetic and fluid flow. Models presented in this thesis gives a more accurate description of the real stirring conditions and flow pattern, by taking into account the multi-physics behavior of the induction stirring process in an induction stirred ladle. This thesis presents a formulation of coupled electromagnetic and fluid flow equations. The coupled electromagnetic and fluid flow equations are solved using the finite element method in two and three-dimensions. The simulation model is used to predict values of steel velocities and magnetic flux density. The simulation model is also used to predict the effect of increased current density on flow velocity. Magnetic flux density values obtained from the model are verified against experimental values.

 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 34 p.
Keyword
induction ladle, electromagnetic, Lorentz forces, magnetic stirrer, magnetic diffusion, Navier-Stokes, FEM
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-97895 (URN)978-91-7501-324-4 (ISBN)
Presentation
2012-06-15, Sal M127, KTH, Brinellvägen 23, Stockholm, 09:00 (English)
Opponent
Supervisors
Note
QC 20120615Available from: 2012-06-15 Created: 2012-06-15 Last updated: 2012-06-15Bibliographically approved

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