SGER: EFFECT OF NANO-IMPRINTED SURFACES WITH SPECIFIC PERIODICITIES ON POOL BOILING

国家科学基金建议编号：CTS-0630703主要研究员：Banerjee，Debjyote附属公司：德克萨斯A&M大学建议标题：SGER：特定周期的纳米印迹表面对池沸腾的影响这个为期一年的SGER项目将研究有序纳米结构表面对池沸腾的影响。垂直排列的具有特定周期(最小尺寸为50-100 nm)的纳米线将在不同的衬底(如硅和吡喃)上制备。这种纳米结构的衬底将被夹在加热器上，用于使用全氟碳流体进行池沸腾实验。将测量有序纳米结构表面上的池沸腾热流，并与原子光滑表面(例如抛光硅)上的池沸腾热流进行比较。智力优势：此前，首席研究员和其他研究小组报告称，使用涂在加热器上的随机定位和垂直排列的碳纳米管“森林”，池沸腾热流增加了约30%-350%。潜在的增强因素被发现是：(1)高度；(2)增强的表面积(“纳米翅片”)；以及(3)碳纳米管较高的导热系数。本项目中沸腾实验的数据将被用来估计不同因素(例如几何形状、材料的热物理性质等)对总热流的相对贡献。更广泛的影响：沸腾实验将被用来深入了解池沸腾中微/纳米尺度的传输机制，并帮助首席研究员为未来的职业发展建立一个新的研究计划。潜在的应用是开发更有效的热管理技术(例如，电子冷却、新型热管、生物技术等)。该计划将通过研究生和本科生研究人员的参与，培训纳米制造和冷却技术方面的熟练劳动力。社会成员的更广泛参与将包括学校教育工作者、贫困学生和少数族裔学生。首席研究员将教授本科课程和开发新的研究生课程(流体力学、传热学、多相流和纳米技术)。首席调查员将把研究成果作为补充内容纳入这些课程。该实验设备将被用作学生的演示模块，还将加强德克萨斯农工大学在新兴技术方面的基础设施。

ABSTRACTNational Science FoundationProposal Number: CTS-0630703Principal Investigator: Banerjee, DebjyotiAffiliation: Texas A & M UniversityProposal Title: SGER: The Effect of Nano-Imprinted Surfaces with Specific Periodicities on Pool BoilingThis one year SGER project will investigate the effect of ordered nano-structured surfaces on pool boiling. Vertically aligned nano-wires with specific periodicities (minimum size ~50-100 nm) will be fabricated on various substrates (e.g., Silicon and Pyrex). The nano-structured substrate will be clamped on a heater for performing pool boiling experiments using per-fluorocarbon fluids. The pool boiling heat fluxes on the ordered nano-structured surfaces will be measured and compared with those on atomic smooth surfaces (e.g., polished Silicon). Intellectual Merit: Previously the Principal Investigator and other research groups reported ~30-350% enhancement in pool boiling heat fluxes using randomly localized and vertically aligned Carbon Nanotube "forests" that were coated on heaters. Potential factors responsible for enhancement were found to be: (1) the height; (2) the enhanced surface area ("nano-fins"); and (3) the higher thermal conductivity of the Carbon Nanotubes. The data from the boiling experiments in this project will be used to estimate the relative contribution to total heat flux from the different factors (e.g., geometry, material thermo-physcial properties, etc.). Broader Impacts: The boiling experiments will be used to gain insights into the micro/nano-scale transport mechanisms in pool boiling and help the Principal Investigator to establish a novel research program for future career development. The potential applications are in development of more efficient thermal management techniques (e.g., electronic cooling, novel heat pipes, biotechnology, etc.). This program will train a skilled work force in nanofabrication and cooling technologies - by involving graduate and undergraduate student researchers. Broader participation by members of the society will involve school educators, underprivileged and minority students. The Principal Investigator will teach undergraduate courses and develop new graduate courses (in fluid mechanics, heat transfer, multi-phase flows and nanotechnology). The Principal Investigator will incorporate the research results as additional contents into these courses. The experimental apparatus will be used as a demonstration module for students and will also enhance the infrastructure of Texas A&M University in emerging technologies.