A modified enthalpy method was used to numerically model experiments on solidification of a bismuth-tin alloy which were performed during the 1997 flight of the MEPHISTO-4 experiment on the US Space Shuttle Columbia. This modified enthalpy method was incorporated into an in-house code SOLCON and a commercial CFD code CFX; Soret effect was taken into account by including an additional thermo-diffusion term into the solute transport equation and the effects of thermal and solutal convection in the microgravity environment and of concentration-dependent melting temperature on the phase change processes were also included. In this paper an overview of the results obtained as part of MEPHISTO project is presented. The numerical solutions are compared with actual microprobe results obtained from the MEPHISTO experiment.
Une méthode enthalpique est adaptée pour la modélisation d'une expérience de solidification dirigée de l'alliage bismuth-étain qui a eu lieu en 1997 durant le vol du dispositif MEPHISTO-4 embarqué dans la navette spatiale américaine Columbia. Ce modèle a été implémenté conjointement dans un code du laboratoire SOLCON et dans le code commercial CFX. L'effet Soret a été pris en compte en introduisant des termes de thermo-diffusion additionnels dans l'équation de transport solutal. Les effets de la convection thermique et solutale en microgravité ainsi que ceux de la température de changement de phase qui est une fonction de concentration ont également été pris en compte. Dans cet article une revue des résultats faisant partie du projet MEPHISTO est présentée. Les solutions numériques sont comparées aux relevés expérimentaux.
Mots-clés : Transferts thermiques, Solidification, Microgravité, Expérience MEPHISTO
Eddie Leonardi 1; Graham de Vahl Davis 1; Victoria Timchenko 1; Peter Chen 1; Reza Abbaschian 2
@article{CRMECA_2004__332_5-6_403_0, author = {Eddie Leonardi and Graham de Vahl Davis and Victoria Timchenko and Peter Chen and Reza Abbaschian}, title = {Modelling of binary alloy solidification in the {MEPHISTO} experiment}, journal = {Comptes Rendus. M\'ecanique}, pages = {403--411}, publisher = {Elsevier}, volume = {332}, number = {5-6}, year = {2004}, doi = {10.1016/j.crme.2004.02.010}, language = {en}, }
TY - JOUR AU - Eddie Leonardi AU - Graham de Vahl Davis AU - Victoria Timchenko AU - Peter Chen AU - Reza Abbaschian TI - Modelling of binary alloy solidification in the MEPHISTO experiment JO - Comptes Rendus. Mécanique PY - 2004 SP - 403 EP - 411 VL - 332 IS - 5-6 PB - Elsevier DO - 10.1016/j.crme.2004.02.010 LA - en ID - CRMECA_2004__332_5-6_403_0 ER -
%0 Journal Article %A Eddie Leonardi %A Graham de Vahl Davis %A Victoria Timchenko %A Peter Chen %A Reza Abbaschian %T Modelling of binary alloy solidification in the MEPHISTO experiment %J Comptes Rendus. Mécanique %D 2004 %P 403-411 %V 332 %N 5-6 %I Elsevier %R 10.1016/j.crme.2004.02.010 %G en %F CRMECA_2004__332_5-6_403_0
Eddie Leonardi; Graham de Vahl Davis; Victoria Timchenko; Peter Chen; Reza Abbaschian. Modelling of binary alloy solidification in the MEPHISTO experiment. Comptes Rendus. Mécanique, Microgravity / La micropesanteur, Volume 332 (2004) no. 5-6, pp. 403-411. doi : 10.1016/j.crme.2004.02.010. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2004.02.010/
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