| Autor: |
Nzebuka, Gaius Chukwuka, Waheed, Mufutau Adekojo |
| Zdroj: |
Diffusion and Defect Data Part A: Defect and Diffusion Forum; November 2018, Vol. 389 Issue: 1 p183-194, 12p |
| Abstrakt: |
A numerical modeling of diffusion-controlled heat and specie transfer using a source base method to determine evolution of liquid/solid fraction from energy equation both for constant densities in the phases and variable densities as a function of temperature and concentration was developed to predict macro-solute redistribution in binary alloy system. From the results, it is observed that there was a solute depleted zone near the chill surface and that, the source base method can be effectively implemented without the need for setting a large arbitrary value in determining the derivative of liquid fraction-temperature function . The cooling curve and the liquid volume fraction versus temperature profile shows a smooth transition from fully liquid to mushy zone and then to fully solid state, hence, adequate handling of the jump discontinuity was ensured. The liquid fraction-temperature relation outlined in this work is suitable for tracking the liquid/solid interface. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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