Title: Influence of forced convection on the directional solidification of AlSi alloys: comparison of experiments and simulation

Authors: Johannes Dagner, Jochen Friedrich, Georg Muller

Addresses: Fraunhofer IISB, Department of Crystal Growth, Schottkystr. 10, 91058 Erlangen, Germany. ' Fraunhofer IISB, Department of Crystal Growth, Schottkystr. 10, 91058 Erlangen, Germany. ' Fraunhofer IISB, Department of Crystal Growth, Schottkystr. 10, 91058 Erlangen, Germany

Abstract: In order to predict the formation of dendritic microstructure the software package CrysMAS, developed at Fraunhofer IISB, is extended using a multi-scale model based on the work of Wang and Beckermann (1996). The model is validated, by applying it to the directional solidification of AlSi7 under the influence of a Rotating Magnetic Field (RMF). The calculated results are compared to experiments conducted by MICAST partners (Steinbach, 2005). A good correlation between simulation and experiment is found for the macrosegregation caused by the RMF. However, the calculated results for the primary dendrite spacing (PDS) do not correlate well with experimental results.

Keywords: dendritic alloy solidification; directional solidification; multi-scale modelling; microstructure; magnetohydrodynamics; forced convection; rotating magnetic field; RMF; simulation.

DOI: 10.1504/PCFD.2009.027366

Progress in Computational Fluid Dynamics, An International Journal, 2009 Vol.9 No.6/7, pp.357 - 367

Published online: 21 Jul 2009 *

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