Transport Phenomena During Solidification of Multi-ComponentMixtures

多组分混合物凝固过程中的传输现象

• 批准号: 8808888
• 负责人: Christoph Beckermann
• 金额: $ 7.8万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8808888&HistoricalAwards=false
• 关键词: Transport; Phenomena; During; Solidification; Multi

The objective of the proposed research is to obtain an improved understanding of the transport phenomena occurring during solidification of multicomponent mixtures. The research is aimed at investigating the effects of buoyancy and solid/liquid density difference driven flow in the liquid phase on the heat and mass transfer and solidification processes. A consistent model that integrates the description of the transport phenomena occurring on a macroscopic level, such as momentum, energy, and species transfer due to convection and diffusion, as well as on a microscopic level, such as nucleation, interfacial transfer, and growth of the microstructures will be developed. The theoretical work will be supplemented by a comprehensive experimental program through which qualitative and quantitative information about the relevant transport phenomena can be obtained and which serves to validate the model predictions. The results obtained through the proposed research will contribute to improved understanding and control of a wide range of processes involving solidification and will lead to more realistic predictions and optimization of material properties. The work is pertinent to ingot solidification, shape casting, directional solidification, continuous casting, welding processes, rapid solidification, electroslag remelting, as well as coating, purification, crystal growth and polymer production.

所提出的研究的目标是获得一个改进的 了解发生在运输过程中的现象 多组分混合物的固化。 该研究旨在 研究浮力和固体/液体密度的影响 差驱动液相流动对热量和质量的影响 转移和固化过程。 一个一致的模型， 集成了发生在一个传输现象的描述 宏观水平，如动量，能量和物种转移，由于 对流和扩散，以及在微观层面上， 如微结构的成核、界面转移和生长 将被开发。 理论工作将得到补充， 综合性实验项目， 有关相关传输现象的定量信息可以 获得，并用于验证模型预测。 通过拟议研究获得的结果将有助于 更好地理解和控制各种过程 这将导致更现实的预测 和材料性能的优化。 这项工作与 铸锭凝固、成型铸造、定向凝固、 连续铸造、焊接工艺、快速凝固、 电渣重熔，以及涂层、净化、结晶 生长和聚合物生产。