PECASE: Oscillating Flows as a Novel Mechanical Separation Method for Macroscale and Microscale Applications

建议编号CTS-0643023主要研究人员：Aaron M.Thomas大学/研究所：爱达荷州大学职业生涯：振荡流动作为一种新的机械分离方法，适用于宏观和微观应用振荡或脉动流动可以作为一种新的气液两相物质的机械分离和传输机制。振荡流动是独特的，因为分离是由气体或液体物种分子扩散的差异决定的。一个主要的目标是探索和阐明一种新的机械方法，利用宏观和微观尺度的振荡流动来分离气体和液体系统中的物种。这项研究将包括1)使用理论模型预测不同时间和长度尺度上的物种移动，以及2)验证和修正这些模型的实验。第一个关键目标是在宏观尺度上进行理论和实验研究。具体地说，将分析独特的几何构型，如具有波状壁面边界的管子，以确定几何形状对流动分布的影响，从而确定混合物中物种的分离和传质。归根结底，需要一个具有大间隔和高吞吐量的系统。第二个主要目标是在微通道中用简单的液体系统进行微尺度的研究，以充分了解交流电场对流体运动和物质传输的影响。将研究更复杂的生物分离，如DNA和蛋白质。PI的教育目标是培养各级研究生、本科生和K-12学生批判性思维、有效沟通和解决问题的能力。在大学一级，将开发新的实验室实验并将其纳入课程。这些课程将鼓励本科生继续攻读研究生学位。在社区内，PI将努力鼓励K-12学生，特别是美洲原住民学生进入科学领域。为了做到这一点，他将在当地学校以及当地的Nez Perce和Coeur d‘Alene保留地进行示威。此外，PI计划帮助美国原住民学生过渡到大学生活，以提高他们的大学保留率，并帮助他们获得更高的学位。

AbstractProposal Number CTS-0643023Principal Investigator: Aaron M. ThomasUniversity/Institution: University of Idaho CAREER: Oscillating Flows as a Novel Mechanical Separation Methodfor Macroscale and Microscale ApplicationsOscillating or pulsatile flows can be used as a novel mechanical separation and transport mechanism for species in the gas and liquid phase. Oscillating flows are unique in that the separation is dictated by the difference in the molecular diffusion of a gas orliquid species. A primary goal is to explore and elucidate a novel mechanical method for the separation of species in gas and liquid systems using oscillating flows at both themacro and micro scales. This research will involve 1) prediction of species movement atdifferent time and length scales using theoretical models, and 2) experiments to validate and correct these models. The first key objective is to perform theoretical and experimental research on the macroscale. Specifically, unique geometrical configurations such as tubes with wavy walled boundaries will be analyzed to determine the effect of geometry on the flow profiles and thus the separation and mass transfer of species in mixtures. Ultimately, a system having a large separation with a high throughput is needed. The second key objective is to carry out research on the microscale with simple liquid systems in microchannels to fully understand the effect of AC fields on fluid movement and species transport. More complex biological separations such as DNA and proteins will be studied. The PI's educational goal is to train students at all levels graduate, undergraduate, and K-12 to think critically, communicate effectively, and solve problems. At the university level, new laboratory experiments will be developed and integrated into the curriculum. These classes will encourage undergraduate students to continue their education with a graduate degree. Within the community, the PI will strive to encourage K-12 students, especially Native American students, to enter the sciences. To accomplish this, he will perform demonstrations at local schools and on the local Nez Perce and Coeur d'Alene reservations. Further, the PI has plans to help Native American students make the transition to college life so that improve their college retention and to help them obtain advanced degrees.