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

摘要项目编号csts -0643023首席研究员：Aaron M. thomas大学/机构：爱达荷大学职业生涯：振荡流动作为宏观和微观尺度应用的新型机械分离方法振荡或脉冲流动可以作为气相和液相中物种的新型机械分离和输送机制。振荡流动的独特之处在于，分离是由气体或液体分子扩散的差异决定的。主要目标是探索和阐明一种新的机械方法，用于在宏观和微观尺度上使用振荡流分离气体和液体系统中的物种。本研究将包括：1)利用理论模型预测物种在不同时间和长度尺度上的运动；2)通过实验对这些模型进行验证和修正。第一个关键目标是在宏观尺度上进行理论和实验研究。具体来说，将分析独特的几何结构，如具有波浪壁边界的管道，以确定几何结构对流动剖面的影响，从而确定混合物中物质的分离和传质。最终，需要一个具有大分离和高吞吐量的系统。第二个关键目标是在微通道中开展简单液体系统的微尺度研究，以充分了解交流场对流体运动和物种运输的影响。更复杂的生物分离，如DNA和蛋白质将被研究。PI的教育目标是培养各级学生的批判性思维，有效沟通和解决问题的能力，包括研究生，本科生和K-12。在大学阶段，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，特别是美国原住民学生，进入科学领域。为了实现这一目标，他将在当地学校以及当地内兹珀斯和科达伦保留地进行示范。此外，PI还计划帮助印第安学生过渡到大学生活，以提高他们的大学留校率，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.