Dynamics of leaves with different wettability due to raindrop impact
雨滴影响下不同润湿性叶片的动力学
基本信息
- 批准号:1903989
- 负责人:
- 金额:$ 5.75万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-08-16 至 2020-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
PI: Jung, SunghwanProposal Number: 1604424Based on how easy it is for a surface to be wetted by water, it can be hydrophilic or hydrophobic. The proposed research is inspired by biological surfaces, like leaves, that exhibit different wetting behavior in their lifetime, and turn from hydrophobic to hydrophilic as natural or man-made pollutants interact with their surface. Investigating how the dynamics of drops splashing on leaves change because of changes on surface characteristics is important for understanding early catastrophic leaf loss and developing methods to avoid it. This can have further implications on predicting levels of food and forest resources.Most of the previous work done by biologists and biochemists about shedding of leafs, has focused on acute chemical effects of air contaminants on leaf surfaces. Nevertheless, both the physical mechanism of a leaf turning hydrophilic and the dynamical aspects of hydrophilic leaves in response to raindrops are not well understood, which may significantly contribute to catastrophic leaf loss after rain. The PI proposes to investigate the interplay between a leaf?s wettability, elasticity, and drop spreading, inspired by a raindrop impacting a leaf in nature. First, the mechanism of transitioning from hydrophobic to hydrophilic leaves will be explored. Secondly, the spreading dynamics of a droplet on a curved substrate will be formulated both macroscopically and microscopically in terms of wettability and a falling speed, which will allow the estimation of an impact force and drop-spreading radius on the leaf. Finally, a leaf?s mechanical moduli and ultimate strengths will be characterized, in order to understand bending and torsional deformations of a leaf upon drop impact. The PI will pursue personal and educational interests for students with disabilities. As an educational objective, the PI will develop research programs that assist disabled students in overcoming the difficulties encountered in the current educational system, due to impaired social and communication skills. A proposed peer-buddy program is designed for students with autism or other social impairments by exposing them to laboratory research along with typical peers in structured environments. An inclusive environment would provide the students with structured research opportunities, which would help to develop the confidence and capacity needed to effectively communicate and collaborate with their peers, and eventually become future engineers or scientists.
PI:Jung, Sunghwan 提案编号:1604424 根据表面被水润湿的容易程度,它可以是亲水的或疏水的。这项研究的灵感来自于生物表面,比如叶子,它们在其生命周期中表现出不同的润湿行为,当天然或人造污染物与其表面相互作用时,它们会从疏水性变为亲水性。研究由于表面特性的变化而导致的液滴溅落在叶子上的动力学如何变化对于了解早期灾难性叶子损失和开发避免它的方法非常重要。这可能对预测食物和森林资源水平产生进一步的影响。生物学家和生物化学家之前所做的关于叶子脱落的大部分工作都集中在空气污染物对叶子表面的急性化学影响上。然而,叶子变成亲水性的物理机制和亲水性叶子响应雨滴的动力学方面尚不清楚,这可能会在很大程度上导致雨后灾难性的叶子损失。受到自然界中雨滴撞击叶子的启发,PI 提议研究叶子的润湿性、弹性和水滴扩散之间的相互作用。首先,将探讨从疏水性叶子转变为亲水性叶子的机制。其次,液滴在弯曲基底上的扩散动力学将在宏观和微观上根据润湿性和下落速度来制定,这将允许估计叶片上的冲击力和液滴扩散半径。最后,将表征叶片的机械模量和极限强度,以便了解叶片在跌落冲击时的弯曲和扭转变形。 PI 将为残疾学生追求个人和教育兴趣。作为一项教育目标,PI 将制定研究计划,帮助残疾学生克服由于社交和沟通能力受损而在当前教育体系中遇到的困难。拟议的同伴伙伴计划是为患有自闭症或其他社交障碍的学生设计的,让他们与结构化环境中的典型同龄人一起进行实验室研究。包容性的环境将为学生提供结构化的研究机会,这将有助于培养与同行有效沟通和协作所需的信心和能力,并最终成为未来的工程师或科学家。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Sunny Jung其他文献
Sunny Jung的其他文献
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{{ truncateString('Sunny Jung', 18)}}的其他基金
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- 批准号:
2401507 - 财政年份:2024
- 资助金额:
$ 5.75万 - 项目类别:
Standard Grant
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2042740 - 财政年份:2021
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MCA:不稳定风和表面形态对植物蒸腾作用的影响
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2120739 - 财政年份:2021
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$ 5.75万 - 项目类别:
Standard Grant
RAPID: Collaborative Research: New Generation of a Bio-inspired Protective Mask Based on Thermal & Vortex Traps
RAPID:合作研究:新一代基于热的仿生防护口罩
- 批准号:
2028075 - 财政年份:2020
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$ 5.75万 - 项目类别:
Standard Grant
Collaborative Research: Investigating aerial maneuvers in bat flight using experiments, mathematical modeling, and robotic mimicry
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2002714 - 财政年份:2020
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Collaborative Research: bubble impacting a curved surface: a sustainable way to sanitize produce
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1919753 - 财政年份:2019
- 资助金额:
$ 5.75万 - 项目类别:
Standard Grant
Dynamics of leaves with different wettability due to raindrop impact
雨滴影响下不同润湿性叶片的动力学
- 批准号:
1604424 - 财政年份:2016
- 资助金额:
$ 5.75万 - 项目类别:
Standard Grant
Characterizing Fluid Properties for Micro/Nano Droplet Using High-Q Whispering Gallery Modes
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1438112 - 财政年份:2014
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$ 5.75万 - 项目类别:
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$ 5.75万 - 项目类别:
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1205642 - 财政年份:2013
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$ 5.75万 - 项目类别:
Continuing Grant
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