Low-Prandtl Number Buoyancy and Surface Tension Induced Convection with/without Solidification and Mushy Zone

低普朗特数浮力和表面张力引起的对流，有/没有凝固和糊状区域

• 批准号: 9114775
• 负责人: Jean Koster
• 金额: $ 20.3万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9114775&HistoricalAwards=false
• 关键词: Low; Prandtl; Number; Buoyancy; Surface

A novel radiographic flow visualization technique, whose development was initiated under a NSF research equipment grant, is proposed to study the buoyancy and surface tension induced convection and their interaction with phase change in model systems relevant to materials processing, including crystal growth and casting. The technique is based on the use of metallurgically compatible, neutrally buoyant tracer particles which are more radio-opaque compared to the melt. The proposed work will include further development of the radiographic tracer technique as well as studies on the convection-mediated solidification processes, including the formation of mushy zone.

一种新的射线流动显示技术， 在美国国家科学基金会的研究设备下， 格兰特，建议研究浮力和表面张力 诱导对流及其与相变的相互作用 与材料加工相关的模型系统，包括 晶体生长和浇铸。 这项技术是基于使用 一种与水相适应的中性浮力示踪剂 与熔融物相比更不透射线的颗粒。 拟议的工作将包括进一步发展 放射示踪技术以及对 对流介导的固化过程，包括 糊状区的形成。