"Contact Drop Formation and Contact Line Flows"

[66141]布朗大学的一个为期三年的项目，将研究移动接触线的结构和动力学，以及纳米尺度流动对制造和生物技术中液滴沉积的实际应用的影响。在流体力学的连续介质描述中，运动接触线是一个奇点，因为在液、固、气三相的运动交界处不能满足无滑移边界条件。该边界条件的松弛在实验中仍未被探索，目前的计划是寻求以纳米尺度的分辨率直接测量流动。该计划的第二个组成部分将是确定接触线行为如何通过接触滴沉积影响小液滴的宏观形成，这一过程在包装、点胶、制造和生物技术等工业中有直接应用。在这项研究中获得的结果将有助于指导设计和分析丰富的科学和工业应用，包括涂层技术，微加工包装和制造。该项目将支持一名研究生和一名本科生。除了培养研究生外，布朗大学还将与工业合作伙伴进行大量互动，并积极拓展到更广泛的社区，包括招募代表性不足的少数民族学生，K-12学生和教师的参与，以及向大众科学媒体宣传结果。

1066141BreuerA three year program conducted at Brown University, will study the structure and dynamics of a moving contact line, and the implications of that nanoscale flow to the very practical application of droplet deposition for manufacturing and biotechnology. The moving contact line represents a singularity in the continuum description of fluid mechanics, as the no-slip boundary condition cannot be satisfied at the moving junction between a liquid, solid and gas phases. The relaxation of that boundary condition remains unexplored experimentally, and the current program seeks to directly measure the flow with nanometer-scale resolution. A second component of the program will be to determine how the contact line behavior affects the macroscopic formation of small droplets through contact drop deposition, a process which has direct application in industry for packaging, dispensing, manufacturing and biotechnology. The results obtained during this research will help guide design and analysis for a wealth of scientific and industrial applications, including coating technologies, microfabrication packaging and manufacturing. The program will support a graduate research student, as well as an undergraduate student. In addition to training of graduate students, there will be substantial interactions between Brown and industrial partners, and active outreach to the broader community, including the recruitment of underrepresented minority students, participation of K-12 students and teachers and in publicizing of results to the popular scientific media.