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Numerical Analysis of the Rapid Solidification Process of NiTi Binary Alloy

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Ternik P., Zadravec M., Svetec M., Rudolf R.
Acta Physica Polonica A
|
2015
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vol. 128
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issue 1
43-47
EN
The objective of the present work is to analyse the solidification process of NiTi binary alloy. The physical medium is taken as an incompressible fluid where the heat is transferred by conduction and convection, including the thermal phase change phenomenon. The last one is modelled by the improvement procedure called enthalpy-porosity formulation, where the liquid-solid mushy zone is treated as a porous zone with porosity equal to the liquid fraction. The numerical model is based on the finite volume method in body fitted coordinates with a SIMPLER scheme to couple the pressure and velocity fields. The results are presented for the velocity and temperature field, as well as for the NiTi mass fraction during the solidification process.
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