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

[01:96 . 69] sangi Reddy， pramod这项研究是为了了解能量是如何在两个非常靠近的表面之间流动的，这些表面之间的间隙小到10纳米。所得到的数据是重要的，因为所获得的知识将有助于建立有效地操纵小型设备中的能量流的方法。有许多模型预测了这些行为，但相对较少的实验结果存在来验证或反驳它们。本研究将有助于模型验证。该提案还包括广泛的外展活动，以吸引本科生和研究生以及代表性不足的少数民族参与研究。K-12学生的模块将加入新颖的原子力显微镜，令人印象深刻。本项目旨在验证和否定纳米间隙平行板间近场辐射的理论和数值研究。pi已经成功地演示了200纳米间隙辐射的初步测量，并计划将间隙减小到10纳米。该实验装置将用于验证多种材料和辐射整流器的组合，并提高量热计的性能（具有皮瓦分辨率）。该实验设备是在当前国家科学基金会的奖励下开发的。关于纳米间隙中近场辐射传热的几个重要问题将被解决：(1)近场传热极性电介质和双曲材料，(2)热整流，(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.