Melt Nucleating and Two-Dimensional Temperature Fluctuation Model
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摘要: 用數學方法證明了二維穩態溫度起伏數學模型的Fourier級數形式解是收斂的,該溫度起伏的數學模型的解是惟一的而且是穩定的.這個模型的溫度解呈現出指數振蕩衰減,驗證了熔液對流促使溫度產生大的起伏,導致大量晶核形成這一熔體形核機制的正確性.Abstract: A two-dimension steady temperature fluctuation mathematical model is studied. The solution of the model is proved to be existential, unique and steady. The temperature solution of the mathematical model shows an exponentially descendent and oscillatory pattern with respect to the crystal growth direction. It theoretically confirms that the horizontal melt convection condition accelerates temperature fluctuation and results in a large number of nuclei.
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Key words:
- metal solidification /
- crystal growing /
- partial differential equation
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