Direct numerical simulation of solidification microstructures affected by fluid flow
The effects of fluid flow on the solidification morphology of pure materials and solute microsegregation patterns of binary alloys are studied using a computational methodology based on a front tracking/finite difference method. A general single field formulation is presented for the full coupling of phase change, fluid flow, heat and solute transport. This formulation accounts for interfacial rejection/absorption of latent heat and solute, interfacial anisotropies, discontinuities in material properties between the liquid and solid phases, shrinkage/expansion upon solidification and motion and deformation of the solid. Numerical results are presented for the two dimensional dendritic solidification of pure succinonitrile and the solidification of globulitic grains of a plutonium-gallium alloy. For both problems, comparisons are made between solidification without fluid flow and solidification within a shear flow.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 645520
- Report Number(s):
- LA-UR-97-3918; CONF-980635-; ON: DE98001611; TRN: 98:010053
- Resource Relation:
- Conference: 8. international conference on modeling of casting, welding and advanced solidification processes, San Diego, CA (United States), 7-12 Jun 1998; Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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