CAREER: Experimental and Numerical Study of Nanoscale Evaporation Heat Transfer for Passive-Flow Driven High-Heat Flux Devices

职业：被动流驱动高热通量装置纳米级蒸发传热的实验和数值研究

基本信息

批准号：
1454450
负责人：
Shalabh Maroo
金额：
$ 50万
依托单位：
Syracuse University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-01-15 至 2022-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1454450&HistoricalAwards=false
关键词：
CAREER Experimental Numerical Study Nanoscale

项目摘要

1454450 - MarooAbility to remove heat in large amounts and in a very short time (i.e., high heat fluxes) is critical for developing next-generation heat exchangers, high-speed computing, and renewable energy technologies. The proposed study is to take advantage that a thin liquid film at the nanoscale has the potential to achieve the ultra-high heat removal rate with proper liquid supply. Both experiments and molecular level simulations will be used to gain fundamental understanding of such heat removal processes. The integrated educational initiatives of this project will expose students, including those from underrepresented groups in engineering disciplines, to multidisciplinary research and nanotechnology. Outreach includes providing yearly research opportunity to a minority undergraduate student in collaboration with ULSAMP (Upstate Louis Stokes Alliance for Minority Participation), and yearly workshops on nanotechnology to middle-school students in Syracuse City School District as part of ULSAMP outreach to underrepresented and diverse student groups.The objective of the proposed research is to investigate the fundamental physics associated with nanoscale meniscus evaporation coupled with passive liquid flow for achieving high heat flux removal using a synergistic research methodology of molecular simulations with pool boiling and evaporation experiments. Passive liquid flow can be generated in a nanoscale meniscus due to the strong capillary and surface-generated disjoining forces which can lower the meniscus liquid pressure to absolute negative values. The research plan focuses on (1) performing molecular dynamics simulations of water nano-meniscus evaporation to elucidate its behavior and characteristics, (2) pool boiling experiments of water coupled with nanoscale evaporation to enhance the critical heat flux, and (3) experiments on nanoscale meniscus evaporation to achieve high heat flux removal with passive flow of water. The intellectual merits include implementation and validation of a novel "solid-to-liquid heat transfer model" in molecular dynamics to simulate evaporation of water from a heated surface, and fabrication of well-defined novel geometries to achieve nanoscale meniscus evaporation. The education plan includes development and implementation of a three-week module on "Nano-science and Nano-engineering" for first-year undergraduate students in Engineering 101. The module will be based on Model Development Sequences to promote and develop the need for physical and visual understanding of mathematical models and engineering concepts while using fundamental building blocks of atoms and molecules. To assess how novice students use simulation module to explore physical phenomena, assignments with a data-generating mechanism will also be designed to collect real-time performance data.

1454450 - Maroo 在很短的时间内（即高热通量）大量散热的能力对于开发下一代热交换器、高速计算和可再生能源技术至关重要。拟议的研究是利用纳米级的薄液膜有潜力通过适当的液体供应来实现超高的散热率。实验和分子水平模拟将用于获得对这种散热过程的基本了解。该项目的综合教育举措将使学生，包括那些来自工程学科中代表性不足的群体的学生，接触到多学科研究和纳米技术。外展活动包括与 ULSAMP（上州路易斯斯托克斯少数族裔参与联盟）合作，为少数族裔本科生提供年度研究机会，以及每年为锡拉丘兹市学区的中学生举办纳米技术研讨会，作为 ULSAMP 向代表性不足和多元化学生外展活动的一部分该研究的目的是研究与纳米级弯月面蒸发与被动液体流动相结合的基础物理，以利用分子协同研究方法实现高热通量去除池沸腾和蒸发实验的模拟。由于强大的毛细管和表面产生的分离力，可以在纳米级弯月面中产生被动液体流动，这可以将弯月面液体压力降低至绝对负值。该研究计划的重点是（1）对水纳米弯月面蒸发进行分子动力学模拟，以阐明其行为和特征，（2）水池沸腾实验与纳米级蒸发相结合，以提高临界热通量，以及（3）实验纳米级弯液面蒸发，通过水的被动流动实现高热通量去除。智力优势包括在分子动力学中实施和验证一种新颖的“固液传热模型”，以模拟水从加热表面的蒸发，以及制造明确的新颖几何形状以实现纳米级弯液面蒸发。该教育计划包括为工程 101 本科一年级学生开发和实施为期三周的“纳米科学和纳米工程”模块。该模块将基于模型开发序列，以促进和发展物理需求以及对数学模型和工程概念的视觉理解，同时使用原子和分子的基本构建块。为了评估新手如何使用模拟模块探索物理现象，还将设计带有数据生成机制的作业来收集实时表现数据。