| Summary: | 碩士 === 國立臺灣科技大學 === 工程技術研究所 === 79 === A computer program based on energy conservation and appropriate nucleation and growth models was developed to simulate the solidification of ductile iron. The forward time central spacing algorithm was used. Further, the simulation results are analyzed by comparing with the experimental results.
The simplified eutectic cell growth model coupled with proportional nucleation and heterogeneous nucleation respectively are used as the solidification models in this study. In light of these solidification models. the simulation can be achieved by personal computer.
In the traditional solidification simulation, the obvious deviations between experimental and calculation. results are basically caused by negleting the importance of the interfacial thermal resistance.
In addition to the traditional simulation technique, interfacial thermal resistance obtained as a funtion of temperature is employed in the simulation to improved the calculation results.
From the simulations in this study, the nucleation coefficient in the proportional model and the nucleation particle number in the heterogeneous model are recommened to choose as 1000 and 1016 respecticely. Moreover, it is found that the heterogeneous model is the better one.
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