2-Dimensional FEM modeling of macrosegregation in the directional solidification with mesh adaptation

doi:10.1016/S1006-7191(08)60094-0

Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (3): 233-240.DOI: 10.1016/S1006-7191(08)60094-0

• Research paper • Previous Articles

2-Dimensional FEM modeling of macrosegregation in the directional solidification with mesh adaptation

Weitao LIU¹,Changchuan XIE²,Michel Bellet and Herve³

1.Beijing Metallurgical Technology Research Institute, CCTEC Engineering Corporation Limited, Beijing 100081,China
2.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083,China
3.Ecole des Mines de Paris, Sophia Antipolis, 06904, France and Ecole des Mines de Nancy, Nancy, 54042,France

Received:2008-07-03 Revised:2008-09-19 Online:2009-06-09 Published:2009-10-10
Contact: Weitao LIU

Abstract

Abstract:

In order to improve the prediction accuracy of macrosegregation channel, an algorithm for dynamic remeshing is proposed. The basic idea is to generate fine elements near the liquidus isotherm. The norm of the gradient of solid fraction is used for piloting the remeshing in the mushy zone; whereas, the objective mesh size in the liquid is considered as a function of the distance to the liquidus isotherm. The efficiency of mesh adaptation is demonstrated by prediction of macrosegregation channel in a case of unidirectional solidification.

Key words: Freckle, Solidification, Modeling, Adaptive remeshing

Weitao LIU,Changchuan XIE,Michel Bellet,Herve. 2-Dimensional FEM modeling of macrosegregation in the directional solidification with mesh adaptation[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(3): 233-240.

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2-Dimensional FEM modeling of macrosegregation in the directional solidification with mesh adaptation

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