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Communication Dans Un Congrès Année : 2015

Simulation of free surface and molten metal behavior during induction melting of an aluminium alloy

A Bansal
  • Fonction : Auteur
P Chapelle
J.P. Bellot
  • Fonction : Auteur

Résumé

Electromagnetic forces are widely used for processing metal alloys in particular in the aluminium casting industry. Induction is used in melting technologies (both crucible and channel induction furnaces). Magnetic stirrers are also used in melting or casting furnaces. However these technologies applied to opaque melts require modelling to be done to understand the resultant impact on the fluid and improve the process control. This is especially the case of crucible induction furnaces. A 2D axially symmetric numerical model describing the coupled magnetohydrodynamic and free surface phenomena taking place in an induction metal bath has been developed. The model uses the Ansys Fluent software, supplemented with additional User Defined Functions for the calculation of the Lorentz forces acting on the metal. The calculation of the shape of the free surface is based on the Volume Of Fluid method and a RANS k-ω Shear Stress Transport (SST) approach is used to describe the turbulent stirring of the metal. An original feature of our model is the consideration of an oxide skin covering the metal free surface. It was considered that the oxide film behaves similarly to a deforming wall and that friction effects between the oxide film and the metal result in the development of a shear stress at the top surface of the melt. Two examples of application of model are reported, for lab scale and industrial scale induction furnaces. The lab scale results are compared with measurements of the free surface shape obtained using a fringe projection technique.
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Dates et versions

hal-01334680 , version 1 (21-06-2016)

Identifiants

  • HAL Id : hal-01334680 , version 1

Citer

A Bansal, P Chapelle, E Waz, Y Delannoy, P Le Brun, et al.. Simulation of free surface and molten metal behavior during induction melting of an aluminium alloy. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01334680⟩
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