Presidential Young Investigator Award

传热的理论和实验研究 将进行涉及复杂的微观现象 与（1）接触电阻问题有关的接口， (2)凝固前沿演化 挑战结果 从微观到微观， 水平和平均水平，以及微观的失败 测量技术在微妙的存在 微观结构 磁共振成像（MRI）将 用于非侵入性显微镜、浓度和速度 测量接近凝固前沿，目标是 实现一微米的空间分辨率和速度 下降到0.1 mm/s。 对于接触电阻问题， 分析模型的基础上随机分布的有限 将建立区域联络点。 还将使用MRI 在这个问题中， 接口上的参数。 传热问题的发展意义 微型微电子元件，先进的材料 用于航空航天和生物医学行业， 对二元合金凝固的进一步认识 都将通过一种独特的应用程序来解决 MRI技术。 这项技术将揭示 这是以前微米级无法获得的。

Theoretical and experimental studies of heat transfer phenomena will be performed involving complicated microscopic interfaces related to (1) the contact resistance problem and (2) solidification front evolution. The challenge results from there being no separation of scale between the micro- level and the averaging level, and the failure of microscopic measurement techniques in the presence of delicate microstructures. Magnetic resonance imaging (MRI) will be used for non-invasive microscopy, concentration and velocity measurements close to the solidification front, with a goal of achieving one micrometer spatial resolution and velocities down to 0.1 mm/s. For the contact resistance problem, an analytical model based upon a random distribution of finite area contact spots will be developed. MRI will also be used in this problem to identify the appropriate geometric parameters at the interface. Heat transfer problems of significance to the development of miniaturized microelectronic components, to advanced materials for the aerospace and biomedical industries, and to the further understanding of the solidification of binary alloys in metal casting will all be tackled by a unique application of MRI technology. This technique will reveal new information previously unobtainable at the micrometer level.