EAGER: Investigation of Nucleate Boiling Phenomena using Hierarchically Porous Constructs with Well-Defined Microstructure

EAGER：使用具有明确微观结构的分层多孔结构研究核沸腾现象

• 批准号: 1643347
• 负责人: Yoonjin Won
• 金额: $ 12万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1643347&HistoricalAwards=false
• 关键词: EAGER; Investigation; Nucleate; Boiling; Phenomena

Investigation of Nucleate Boiling Phenomena using Hierarchically Porous Constructs with Well-Defined Microstructure Phase change heat transfer has been a topic of significant scientific and technological interest as it can serve as an efficient cooling method for high heat flux applications. Nucleate boiling is one of the most effective heat transfer mode, which is governed by a complex process of bubble growth on, and departure from, heating surfaces. Textured surfaces and porous materials have been commonly used to enhance the surface area for heat transfer and the bubble nucleation kinetics. To more effectively utilize nucleate boiling in technological practice, it is essential to better understand the dynamics of bubble nucleation and departure on textured surfaces and porous materials. Such studies will provide multi-disciplinary training opportunities that merge thermal transport physics, nanoengineering, and materials science. The insights gained from such a study would enable advances in a wide range of technologies in which thermal management is critical, including high-power-density electronic devices, data servers, and electronic warfare.The proposed study will seek to design hierarchically porous metallic constructs to engineer nucleate boiling heat transfer. To this end, this study will utilize a new class of three-dimensional (3D) hierarchically porous metallic structures using a recently developed soft matter templating method with independent control over two scales of pore sizes (from nano- to tens of micrometers). The materials system with well-defined porous structure will help to investigate how hierarchical pore distribution affects bubble size, frequency and nucleate boiling phenomena. Simultaneous parametric computational studies and preliminary results from boiling and wetting tests will help to advance fundamental understandings of thermal transport mechanism through porous media.

使用具有明确微观结构的分级多孔结构研究核沸腾现象相变传热一直是具有重大科学和技术意义的主题，因为它可以作为高热通量应用的有效冷却方法。泡核沸腾是最有效的传热模式之一，它由加热表面上气泡生长和离开的复杂过程控制。纹理表面和多孔材料通常用于增强传热和气泡成核动力学的表面积。为了在技术实践中更有效地利用泡核沸腾，有必要更好地了解纹理表面和多孔材料上气泡成核和离开的动力学。此类研究将提供融合热传输物理学、纳米工程和材料科学的多学科培训机会。从这项研究中获得的见解将促进热管理至关重要的广泛技术的进步，包括高功率密度电子设备、数据服务器和电子战。拟议的研究将寻求设计分层多孔金属结构来设计核态沸腾传热。为此，本研究将利用一种新型三维（3D）分层多孔金属结构，使用最近开发的软物质模板方法，独立控制两个尺度的孔径（从纳米到数十微米）。具有明确多孔结构的材料系统将有助于研究分层孔隙分布如何影响气泡尺寸、频率和泡核沸腾现象。同步参数计算研究以及沸腾和润湿测试的初步结果将有助于增进对多孔介质热传输机制的基本理解。

项目成果

Microscopic Analysis of Thin-Film Evaporation on Pore Surfaces

孔表面薄膜蒸发的微观分析

• 发表时间: 2018
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: Montazeria, Kimia;Lee, Hyoungsoon;Won, Yoonjin
• 通讯作者: Won, Yoonjin

Boiling Heat Transfer Using Spatially-Variant and Uniform Microporous Coatings

使用空间变化且均匀的微孔涂层进行沸腾传热

• DOI: 10.1115/ipack2019-6307
• 发表时间: 2019
• 期刊: ASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
• 作者: Quang N. Pham, Youngjoon Suh