Electromagnetic Shaping and Containment of Liquid Metals

这项研究的目的是开发通过使用电磁力处理液态金属的改进方法。具体研究领域包括：源线圈设计，包括开发三维边界元反问题和正演问题求解器，以及开发用于选择特定源配置的优化方法；通过数字图像分析，对液态金属界面的位置和形状进行三维悬浮、约束和成形，包括实验文件；研究整体、表面耦合和体耦合不稳定机制，研究电磁铸造金属的凝固组织，并与传统铸造组织进行比较。建模工作的中心是开发自一致的数值工具，用于设计源线圈的配置和激励，基于悬浮液态金属的理想几何形状和区分备选源选项的标准。实验工作旨在验证建模概念和结果，以及研究用于流动控制和整形的实用电磁配置。如果能够开发出无物理接触处理液态金属的有效技术，就可以大大提高传统铸造工业的效率。

The purpose of the research is to develop improved methods for handling liquid metals through the use of electromagnetic forces. Specific thrust areas of the research include: source coil design, including development of the three-dimensional boundary element inverse problem and forward problem solvers and development of an optimization methodology for choice of specific source configuration; three-dimensional levitation, confinement and shaping, including experimental documentation, through digital image analysis, of position and shape of liquid metal interfaces; studies of whole-body, surface-coupled and bulk- coupled instability mechanisms, and studies of solidification structures of electromagnetically cast metals, with comparisons to conventionally cast structures. The modeling work centers upon development of self- consistent numerical tools for the design of source coil configurations and excitations, based upon desired geometries of levitated liquid metals and criteria which discriminate among alternative source options. The experimental work is aimed toward validation of modeling concepts and results, as well as investigation of practical electromagnetic configurations for flow control and shaping. If effective techniques for handling liquid metals without physical contact can be developed, it could greatly increase the efficiency of the conventional casting industry.