Experiments on Gravity- and Wind-Driven Droplet Stability and Motion on Rough Surfaces
重力和风力驱动的液滴稳定性和粗糙表面运动实验
基本信息
- 批准号:0828469
- 负责人:
- 金额:$ 16.6万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2009
- 资助国家:美国
- 起止时间:2009-08-01 至 2011-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
CBET - 0828469 White, Edward B. Liquid droplets on solid surfaces can remain fixed to the surface, run down the surface due to gravity or run along the surface due to external air flow. Models exist for droplet stability to gravity forcing as do some low-Reynolds-number simulations of stability to wind forcing. These models have received little experimental validation due to the difficulty of measurements needed for model validation and contact angle variation, particularly on rough surfaces. To address this shortcoming, a new measurement technique has been developed that reveals a droplet's interface shape and contact angles by tracking the refraction of a laser speckle pattern across the liquid/gas interface from top-view images. This technique will determine how contact angles are affected by roughness amplitudes and distributions on common engineering metals. It will also determine the accuracy of existing models of droplets' static stability to gravity forcing and how it differs from wind-driven droplets. These questions are being addressed through a systematic program of measurements of distilled-water droplets on rough metal surfaces, droplets on inclined surfaces and measurements of wind-driven droplets on inclined surfaces just below critical inclination angles. Wetting and shedding of liquids from surfaces affect numerous areas of technology from manufacturing processes to aircraft icing. Beyond its broad technological impacts, the work will provide ample opportunities for undergraduate research participation.
固体表面上的液滴可以保持固定在表面上,或者由于重力作用而沿着表面向下流动,或者由于外部空气流动而沿着表面流动。液滴在重力作用下的稳定性模型和一些低雷诺数的风力作用下的稳定性模拟已经存在。由于模型验证和接触角变化所需的测量困难,特别是在粗糙表面上,这些模型几乎没有得到实验验证。为了解决这一缺点,一种新的测量技术已经被开发出来,通过跟踪从顶视图图像中穿过液/气界面的激光散斑图案的折射来揭示液滴的界面形状和接触角。该技术将确定接触角如何受到粗糙度振幅和分布的影响。它还将确定现有液滴在重力作用下的静态稳定性模型的准确性,以及它与风力驱动的液滴有何不同。这些问题正在通过测量粗糙金属表面上的蒸馏水滴、倾斜表面上的液滴和倾斜表面上刚好低于临界倾斜角的风力液滴的系统程序来解决。液体从表面润湿和脱落影响着从制造过程到飞机结冰的许多技术领域。除了其广泛的技术影响外,这项工作将为本科生参与研究提供充足的机会。
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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Edward White其他文献
Viral hepatitis as an occupational hazard of dentists.
病毒性肝炎是牙医的职业危害。
- DOI:
10.14219/jada.archive.1975.0239 - 发表时间:
1975 - 期刊:
- 影响因子:3.9
- 作者:
James W. Mosley;Edward White - 通讯作者:
Edward White
0298 : Action potential shortening in the pig right ventricular outflow tract epicardium
- DOI:
10.1016/s1878-6480(15)30098-7 - 发表时间:
2015-04-01 - 期刊:
- 影响因子:
- 作者:
Virginie Dubes;Sabine Charron;Charly Belterman;Caroline Rooryck-Thambo;Edward White;Michel Haissaguerre;Ruben Coronel;Olivier Bernus;David Benoist - 通讯作者:
David Benoist
In Situ Scanning Transmission Electron Microscopy (STEM) of Individual Electrochemical Intercalation Events in Graphite
石墨中单个电化学插层事件的原位扫描透射电子显微镜 (STEM)
- DOI:
- 发表时间:
2015 - 期刊:
- 影响因子:2.8
- 作者:
J. Lodico;Edward White;W. Hubbard;Erick Garcia;Bradley D. Parks;B. Zutter;B. Regan - 通讯作者:
B. Regan
Intraforaminal vertebral artery: a rare and risky anomaly
- DOI:
10.1016/j.spinee.2015.06.068 - 发表时间:
2015-11-01 - 期刊:
- 影响因子:
- 作者:
Ronald T. Murambi;Edward White;Timothy R. Steel - 通讯作者:
Timothy R. Steel
Radiological follow-up of endovascularly treated intracranial aneurysms: a survey of current practice in the UK and Ireland
- DOI:
10.1007/s00701-022-05379-4 - 发表时间:
2022-10-11 - 期刊:
- 影响因子:1.900
- 作者:
Cathal John Hannan;Abdurrahman I. Islim;Andrew F. Alalade;Andrew Bacon;Anthony Ghosh;Arthur Dalton;Ashraf Abouharb;Daniel Colman Walsh;Diederik Bulters;Edward White;Emmanouil Chavredakis;George Kounin;Giles Critchley;Graham Dow;Hiren C. Patel;Howard Brydon;Ian A. Anderson;Ioannis Fouyas;James Galea;Jerome St. George;Jarnail Bal;Krunal Patel;Mahmoud Kamel;Mario Teo;Noel Fanning;Nitin Mukerji;Patrick Grover;Patrick Mitchell;Peter C. Whitfield;Rikin Trivedi;Matthew T. Crockett;Paul Brennan;Mohsen Javadpour - 通讯作者:
Mohsen Javadpour
Edward White的其他文献
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{{ truncateString('Edward White', 18)}}的其他基金
Theory and Experiments for Distributed Roughness Effects in Laminar Boundary Layers
层流边界层中分布粗糙度效应的理论与实验
- 批准号:
1805889 - 财政年份:2018
- 资助金额:
$ 16.6万 - 项目类别:
Standard Grant
Experiments on Three-Dimensional Disturbance Interactions Leading to Boundary-Layer Transition
三维扰动相互作用导致边界层转变的实验
- 批准号:
0245253 - 财政年份:2003
- 资助金额:
$ 16.6万 - 项目类别:
Standard Grant
Synaptic Connectivity in the Cerebral Cortex
大脑皮层的突触连接
- 批准号:
8202614 - 财政年份:1982
- 资助金额:
$ 16.6万 - 项目类别:
Continuing grant
Multiuser Research Equipment: Electron Microscopic Studies Of the Mammalian Central Nervous System
多用户研究设备:哺乳动物中枢神经系统的电子显微镜研究
- 批准号:
8105751 - 财政年份:1981
- 资助金额:
$ 16.6万 - 项目类别:
Standard Grant
Ultrastructure and Organization of Sensory Cortex
感觉皮层的超微结构和组织
- 批准号:
7621720 - 财政年份:1977
- 资助金额:
$ 16.6万 - 项目类别:
Standard Grant
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