3D macrosegregation simulation with anisotropic remeshing = Simulation 3D de la macroségrégation avec remaillage anisotrope - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Comptes Rendus Mécanique Année : 2007

3D macrosegregation simulation with anisotropic remeshing = Simulation 3D de la macroségrégation avec remaillage anisotrope

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Résumé

The article presents a three-dimensional coupled numerical solution of momentum, mass, energy and solute conservation equations, for binary alloy solidification. The interdendritic flow in the mushy zone is assumed to obey the Darcy's law. Microsegregation is governed by the lever rule, assuming local equilibrium at phase interfaces. The resulting energy and solute advection-diffusion equations are solved using the Streamline-Upwind/Petrov-Galerkin (SUPG) finite element method. A SUPG-PSPG velocity-pressure formulation is applied for the momentum equation. The full algorithm was implemented in the 3D code THERCAST, together with an anisotropic remeshing method. Two applications have been considered: a small ingot of Pb-48wt%Sn alloy and a large steel ingot. The numerical results of these two cases are presented with the evolution of temperature, liquid velocity, and solute concentration fields during solidification.

Dates et versions

hal-00510639 , version 1 (20-08-2010)

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Sylvain Gouttebroze, Michel Bellet, Hervé Combeau. 3D macrosegregation simulation with anisotropic remeshing = Simulation 3D de la macroségrégation avec remaillage anisotrope. Comptes Rendus Mécanique, 2007, 335 (5-6), pp.269-279. ⟨10.1016/j.crme.2007.05.005⟩. ⟨hal-00510639⟩
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