Using Inverse Analysis to Tailor Micro-Nanopatterned Surfaces for Desired Spectrally and Directionally Dependent Radiative Properties

使用逆分析定制微纳米图案表面，以获得所需的光谱和方向相关的辐射特性

• 批准号: 1032415
• 负责人: John Howell
• 金额: $ 33.5万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1032415&HistoricalAwards=false
• 关键词: Using; Inverse; Analysis; Tailor; Micro

1032415HowellVery small (nano- to micrometer scale) geometric features on the surface of certain materials can cause thermal radiation emission or absorption to have pronounced directional and wavelength variations. Such tailored surfaces have been studied and their characteristics predicted and experimentally verified. In the design of important radiating devices, however, it would be useful to first identify the desirable directional and wavelength characteristics needed for a particular application, and subsequently determine the surface texture and device geometry that will provide these characteristics. Intellectual Merit: This research comprises an inverse mathematical problem, with well-known mathematical difficulties. These difficulties will be addressed resulting in a design method for indentifying specific micro- and nano-scale surface structures that will provide desired directional and spectral radiative emissive and absorptive properties. Therefore, the fundamental research to be performed is to develop inverse analysis methods that can be applied at the micro-nano scale, and to demonstrate that such methods can be validated through comparison with experiment and applied for practical use.Broader Impacts: A robust inverse design method for optimizing radiative properties has important applications including but not limited to improving the efficiency of solar collectors, photovoltaic arrays, lighting and radiant heaters. The research will support a post doctoral student as well as graduate and undergraduate researchers. The results can be incorporated into graduate courses and texts in radiation heat transfer.

1032415 Howell某些材料表面上非常小的（纳米至微米尺度）几何特征可能导致热辐射发射或吸收具有明显的方向和波长变化。这种定制的表面已被研究，其特性的预测和实验验证。然而，在设计重要的辐射器件时，首先确定特定应用所需的理想方向和波长特性，然后确定提供这些特性的表面纹理和器件几何形状，这将是有用的。智力优点：这项研究包括一个逆数学问题，具有众所周知的数学困难。这些困难将得到解决，从而在一个设计方法，用于识别特定的微米和纳米尺度的表面结构，将提供所需的方向和光谱辐射发射和吸收性能。因此，今后的基础性研究是开发能够应用于微纳米尺度的逆分析方法，并通过与实验的比较来验证这些方法的有效性，并将其应用于实际。一种用于优化辐射特性的鲁棒逆设计方法具有重要的应用，包括但不限于提高太阳能收集器、光伏阵列照明和辐射加热器。该研究将支持博士后学生以及研究生和本科生研究人员。研究结果可作为辐射传热研究生课程和教材的参考。