UNS: Thermal Rectification and Heat Transfer Enhancement via Near-Field Radiation

1509691桑吉·雷迪这项研究是为了了解两个表面之间的能量流动是如何进行的，两个表面的距离非常近，间隙小到10纳米。由此产生的数据意义重大，因为所获得的知识将有助于建立有效地操纵小型设备中能量流动的方法。已经有很多模型预测了这些行为，但相对较少的实验结果可以验证或反驳它们。这项拟议的研究将有助于模型的验证。该提案还纳入了广泛的外联活动，以吸引本科生和研究生以及代表人数较少的少数群体参与研究。K-12学生的模块将包含新的原子力显微镜，这是令人印象深刻的。本项目旨在验证和验证已发展的关于纳米间隙平行板之间近场辐射的理论和数值研究。PI已经成功地展示了200 nm带隙辐射的初步测量结果，并计划将带隙缩小到10 nm。该实验装置将用于验证多种材料和辐射整流器的组合，并增强量热仪的性能(具有皮瓦分辨率)。该实验设施正在根据目前的NSF奖项进行开发。关于纳米间隙中近场辐射换热的几个重要问题将被讨论：(1)近场换热，极性介质和双曲线材料，(2)热整流，和(3)高分辨率量热法。

1509691Sangi Reddy, PramodThis research is to understand how energy flows between two surfaces placed very close together, with gaps as small as 10 nano-meters. The resultant data are significant because knowledge gained will help establish methods of manipulating energy flow effectively in small devices. There have been many models predicting these behaviors, but relatively few experimental results exist to verify or disprove them. This proposed study will facilitate model validations. The proposal also incorporates extensive outreach activities to engage undergraduate and graduate students as well as underrepresented minorities in research. Modules for K-12 students will incorporate novel atomic force microscope, which is impressive. This project aims to validate and invalidate the developed theories and numerical studies on the near field radiation between nano-gap parallel plates. The PIs have successfully demonstrated preliminary measurements of the 200 nm gap radiation and plan to reduce the gap down to 10 nm. The experimental setup will be used to validate many combinations of materials and radiation rectifier and enhance the performance of calorimeter (with pico-Watt resolutions). The experimental facility is being developed on a current NSF award. Several significant questions regarding near-field radiation heat transfer in nano-gaps will be addressed: (1) near field heat transfer polar dielectrics and hyperbolic materials, (2) thermal rectification, and (3) high resolution calorimetry.