VERIFICATION OF THE COMPUTATIONAL MODEL OF THE IMPURITY TRANSPORT WITH CONVECTION BY THE EXAMPLE OF CRYSTALLIZATION OF TWO-MATERIAL Pb-Sn MELTS
S. M. Ganina, V. P. Ginkin
VANT. Ser.: Mat. Mod. Fiz. Proc 2010. Вып.3. С. 65-72.
A computational algorithm has been developed for the impurity segregation during crystallization of two-material melts characterized by large-size two-phase areas. The calculation of convection in a porous medium takes into account an additional resistance to flow similar to Darcy law. The liquidus point linearly depends on the concentration of impurity in a liquid phase.
The proposed model has been implemented in GIGAN-2D program complex. Two benchmarks have been run to verify the model: one of them simulated the crystallization of Sn with 10% Pb concentration and another simulated the melting process of Pb with 18% Sn concentration.Keywords: promising materials, intermetallides, directed crystallization, melting, two-phase transient area, benchmark, segregation, mathematical modeling, impurity transport with convection, moving interfaces, computational algorithm.
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