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Multiphase Flow Modeling of Equiaxed Dendritic Solidification With Melt Convection

[+] Author Affiliations
Harald Laux

SINTEF Materials Technology, Trondheim, Norway

O̸yvind Nielsen

SINTEF Materials Technology, Oslo, Norway

Paper No. IMECE2002-32884, pp. 229-236; 8 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 5
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3636-3 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


A Computational Fluid Dynamics model for simulation of equiaxed dendritic solidification with melt convection and crystal transport is developed. This multi-scale multiphase model accounts for transport phenomena on the macro- and the microscales of a solidifying alloy. It predicts nucleation and growth of equiaxed dendrites from a melt, and their transport in the melt. Thermo-solutal convection and remelting of crystals are also included in the multiphase model that is based on the work of Wang and Beckermann (Metall. Mater. Trans. 27A, 1996, p. 2754). To verify the modeling results comparison to published experimental data were made (nucleation, growth and transport of equiaxed crystals from a cooled NH4 Cl-70wt%H2 O solution). It is shown that the predicted evolution of temperature and average bed height (due to crystal sedimentation) are in good agreement with the experimental results.

Copyright © 2002 by ASME



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