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Collaborative Research: Actuating and Sensing Objects on a Free Surface

合作研究：驱动和感测自由表面上的物体

基本信息

批准号：
2042740
负责人：
Sunny Jung
金额：
$ 32.26万
依托单位：
Cornell University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-05-01 至 2025-04-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2042740&HistoricalAwards=false
关键词：
Collaborative Research Actuating Sensing Objects

项目摘要

This collaborative research investigates the strong coupling between floating particles at the air-water interface and water waves, which is a fundamental scientific problem with inspiration for technological innovation. The water surface in nature attracts all sorts of objects, such as biological organisms in search of food and mates, as well as microplastics and oil spills polluting the world's oceans and lakes. Thus, the water surface provides an important opportunity to survey the local ecology and clean the pollutants if one can identify and control these objects on-demand. The outcomes of this project will provide fundamental understanding of physical mechanisms necessary for such applications, which range from locating floating objects in darkness for search and surveillance missions, to collecting marine debris for environmental protection. In addition, the PIs will participate in various educational activities at their home institutions with a focus on recruiting students from under-represented groups. The students participating in this research will be trained in both experimental and theoretical approaches and will engage in active collaboration across institutes through co-advising, virtual group meetings, and presentations. The overall objective of this collaborative research is to gain fundamental understanding of rich dynamical interactions that arise between the floating objects, surface waves and fluid flows. Specifically, the PI team will uncover complex particle-wave interactions in the context of sensing and controlling objects at the fluid-fluid interface. There are different types of hydrodynamic interactions that dominate depending on the relevant length scale of the system. For example, wave dispersion and particle movement on a thin liquid layer are governed by capillary and viscous forces, while the wave-particle dynamics on the deep water surface is governed primarily by inertia and gravity. However, there is no comprehensive framework at present that can resolve the coupled dynamics of the surface waves and particles at the interface across different scales. By combining experiments and mathematical modeling, the four PIs will investigate the fundamentals of wave-particle interactions: sensing (scattered waves) and actuation (force and torque) of floating objects remotely, in the distinct limits of shallow and deep water waves.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.

这项合作研究研究了空气-水界面上的漂浮颗粒与水波之间的强耦合，这是一个具有技术创新灵感的基本科学问题。自然界的水面吸引着各种各样的物体，例如寻找食物和交配的生物有机体，以及污染世界海洋和湖泊的微塑料和石油泄漏。因此，如果能够按需识别和控制这些物体，水面就为调查当地生态和清除污染物提供了重要的机会。该项目的成果将提供对此类应用所需的物理机制的基本了解，这些应用的范围从在黑暗中定位漂浮物体以执行搜索和监视任务，到收集海洋碎片以进行环境保护。此外，PI 将参加其所在机构的各种教育活动，重点是从代表性不足的群体中招收学生。参与这项研究的学生将接受实验和理论方法方面的培训，并将通过共同咨询、虚拟小组会议和演示等方式参与各机构之间的积极合作。这项合作研究的总体目标是获得对漂浮物体、表面波和流体流动之间丰富的动态相互作用的基本了解。具体来说，PI 团队将在流体-流体界面传感和控制物体的背景下揭示复杂的粒子-波相互作用。根据系统的相关长度尺度，有不同类型的流体动力相互作用占主导地位。例如，薄液层上的波色散和粒子运动受毛细管力和粘性力控制，而深水表面的波粒动力学主要受惯性和重力控制。然而，目前还没有一个全面的框架可以解决不同尺度界面上表面波和粒子的耦合动力学问题。通过结合实验和数学模型，四位 PI 将研究波粒相互作用的基本原理：在浅水和深水波的不同限制中远程传感（散射波）和浮动物体致动（力和扭矩）。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。