NSF/Sandia: Novel Thermometry Techniques and Nanostructured Surfaces to Enhance Micro- and Meso-Scale Thermal Management Technologies

国家科学基金提案编号：CTS-0625865主要研究员：尤达，米纳米亚州隶属关系：佐治亚理工学院研究公司GA理工学院提案标题：NSF/SANDIA：新型测温技术和纳米结构表面，以增强微观和中尺度热管理技术本提案是针对热传输和流体力学重点领域的计划征集NSF 05-616提交的。这项研究建议开发用于液体冷却的纳米结构表面。这些特性(例如碳纳米管)极大地增加了表面积，并可能增强微尺度的对流换热。这些表面有可能极大地提高单相液体冷却的热性能，并管理局部“热点”。开发和评估有效的中尺度液体冷却系统还需要测量复杂管道系统中的液体和壁面温度，其尺寸与人类头发的直径相当。然而，几乎没有实用的测温技术可以在不干扰冷却剂流动的情况下测量如此小而复杂的几何形状的温度，从而影响冷却性能。因此，这项研究还将开发可用于复杂微系统的新型非侵入性高空间分辨率测温技术。然后，这些技术将被用于表征和优化纳米结构表面以增强对流换热。这项工作的智力价值在于开发了表面覆盖碳纳米管的微通道。它们将在硅中制造，并结合加热和嵌入式温度传感器来表征整体热性能。此外，还将使用逝去波荧光测温(EFT)来表征局部热性能。为了将非侵入式测温技术扩展到复杂的硅结构，一种新的红外测温技术将被开发出来，它可以利用红外量子点的温度敏感特性来非侵入式地测量不透明的硅微通道中的温度，至少在可见光波段。从这项工作中获得的基本知识将对电子系统微冷却系统的未来发展以及可用于表征这些系统的实验诊断产生广泛影响。这项研究对人们的影响将包括与市中心的高中生一起开发基于纳米到微米技术的网络教育材料。

ABSTRACTNational Science FoundationProposal Number: CTS-0625865Principal Investigator: Yoda, MinamiAffiliation: Georgia Tech Research Corporation GA Institute of Technology Proposal Title: NSF/Sandia: Novel Thermometry Techniques and Nanostructured Surfaces to Enhance Micro- and Meso-Scale Thermal Management TechnologiesThis proposal was submitted in response to Program Solicitation NSF 05-616 in the focus area ofthermal transport and fluid mechanics. This research proposes to develop nanostructured surfaces for liquid cooling. Such features (e.g. carbon nanotubes) greatly increase surface area and may enhance microscale convective heat transfer. These surfaces have the potential to dramatically increase the thermal performance of single-phase liquid cooling and manage local "hot spots."Developing and evaluating effective mesoscale liquid cooling systems also requires measuring liquid-phase and wall surface temperatures in complex piping systems with dimensions comparable to the diameter of a human hair. Yet there are few if any practical thermometry techniques that can measure temperatures in such small convoluted geometries without disturbing the coolant flow, thereby affecting cooling performance. This research therefore will also develop novel nonintrusive high spatial resolution thermometry techniques that can be used in complex microsystems. These techniques will then be used to characterize and optimize the nanostructured surfaces for enhanced convective heat transfer. The intellectual merit of the work is in the development of microchannels with carbon nanotube-encrusted surfaces. They will be fabricated in silicon and incorporate heating and embedded temperature sensors to characterize overall thermal performance. In addition, local thermal performance will be characterized using evanescent wave fluorescence thermometry (EFT). To extend nonintrusive thermometry techniques to complex silicon structures, a new infrared (IR) thermometry technique will be developed that can nonintrusively measure temperature in silicon microchannels which are opaque, at least at visible wavelengths by exploiting the temperature-sensitive characteristics of IR quantum dots. The fundamental knowledge derived from this work will have Broad Impacts on the future development of micro cooling systems for electronic systems and in the experimental diagnostics available for their characterization. The impact of the research on people will include work with inner-city high school students to develop Web-based educational materials on nano- to microscale technology.