Collaborative Research: Sloshing liquid decontamination of compliant surfaces

合作研究：顺应表面的晃动液体净化

• 批准号: 2346686
• 负责人: Andrew Dickerson
• 金额: $ 28.52万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2346686&HistoricalAwards=false
• 关键词: Collaborative; Research; Sloshing; liquid; decontamination

The decontamination of remote surfaces is challenging, particularly when the accumulation of external matter hinders these surfaces’ dynamic function. An example of such surfaces is the small, flexible wings on flapping-wing robots that are beginning to approach the scale of natural insects. Removing liquid contaminants from these surfaces using vibration presents an opportunity for autonomous cleaning and drying. However, at these scales, the motion of the sloshing liquid contaminants and the flexible surfaces on which they rest are coupled—the deformation of one influences the other. Therefore, the principal aim of this project is to provide a deep understanding of how the motion of a surface impacts the motion and ejection of a liquid drop. This project will provide a foundation by which to adapt self-decontamination strategies to other surfaces vulnerable to droplets, such as those in food preparation and healthcare. This project also encompasses outreach activities to local high school students via science fair project mentoring and research opportunities in the PIs’ labs. The objective of this project is to reveal the physics of sloshing liquid contaminates and ejection from surfaces in which the fluid and surface motions are highly coupled. This tightly integrated experimental, theoretical, and numerical study will answer questions in highly interdependent fluid-structure interaction. This project mates two elementary systems—a cantilever and a fluid drop – to form a dynamically complex system. Driving the cantilever base causes it to bend and the drop to slosh and/or slide, and the substrate dynamically responds in turn to drop motion. High-speed videography and precisely controlled vibratory input will enable the characterization of drop motion and ejection events in which the solid substrate can exhibit a range of curvatures and accelerations throughout the vibration cycle. Conventional cantilever and elastica dynamics will be augmented with inertia-related non-conservative fluid forces to quantify dissipation, drop coherence, and fluid removal in these non-stationary processes. Numerics will permit the synthesis of coupled fluid- and solid-governing equations to determine the most effective excitation strategy for substrate decontamination. The ability to self-decontaminate adds a new dimension to the multi-functionality provided by flexible wings and will be critical to the functionality of surfaces vulnerable to chemicals, moisture, and biofilms.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

远程表面的净化具有挑战性，特别是当外部物质的积累阻碍了这些表面的动态功能时，扑翼机器人上的小型柔性翅膀已开始接近自然昆虫的规模。使用振动清除这些表面的液体污染物为自主清洁和干燥提供了机会。然而，在这些规模下，液体污染物的晃动和它们所在的柔性表面是耦合的——其中一个的变形会产生影响。因此，该项目的主要目的是深入了解表面运动如何影响液滴的运动和喷射，该项目将为自净化策略适应其他策略奠定基础。该项目还包括通过科学博览会项目指导和 PI 实验室的研究机会向当地高中生开展表面推广活动。晃动的液体这项紧密结合的实验、理论和数值研究将回答高度相互依赖的流体-结构相互作用的问题，该项目将两个基本系统（悬臂和液滴）结合起来。 – 形成一个动态复杂的系统，驱动悬臂底座使其弯曲，使下落晃动和/或滑动，并且基板依次对下落运动做出动态响应和精确控制的振动输入。将能够表征液滴运动和喷射事件，其中固体基底可以在整个振动周期中表现出一系列曲率和加速度，传统的悬臂和弹性动力学将通过与惯性相关的非保守流体力来增强，以量化耗散、液滴。这些非平稳过程中的相干性和流体去除将允许合成耦合的流体和固体控制方程，以确定底物净化的最有效的激励策略。自净化能力为柔性机翼所体现的多功能性增加了一个新的维度，对于易受化学品、湿气和生物膜影响的表面的功能至关重要。该奖项是 NSF 的法定使命，并通过评估被认为值得支持利用基金会的智力优势和更广泛的影响审查标准。