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熔体形核与二维稳态温度起伏数学模型
Melt Nucleating and Two-Dimensional Temperature Fluctuation Model
【摘要】 用数学方法证明了二维稳态温度起伏数学模型的Fourier级数形式解是收敛的,该温度起伏的数学模型的解是惟一的而且是稳定的.这个模型的温度解呈现出指数振荡衰减,验证了熔液对流促使温度产生大的起伏,导致大量晶核形成这一熔体形核机制的正确性.
【Abstract】 A two-dimension steady temperature fluctuation mathematical model is studied. The solution ofthe model is proved to be existential, unique and steady. The temperature solution of the mathematical model showsan exponentially descendent and oscillatory pattern with respect to the crystal growth direction. It theoretically con-firms that the horizontal melt convection condition accelerates temperature fluctuation and results in a large numberof nuclei.
【关键词】 金属凝固;
晶体生长;
偏微分方程;
【Key words】 metal solidification; crystal growing; partial differential equation;
【Key words】 metal solidification; crystal growing; partial differential equation;
【基金】 国家重大基础研究项目(G2000067206_1)
- 【文献出处】 北京科技大学学报 ,Journal of University of Science and Technology Beijing , 编辑部邮箱 ,2004年03期
- 【分类号】O782
- 【被引频次】6
- 【下载频次】159