Biomimetic pumping by active gill plate arrays: the fluid dynamics of mayfly naiads

项目编号：CBET - 0730907主要研究者：Kiger， Kenneth T.机构：马里兰大学帕克分校主动鳃板阵列的仿生泵：蜉蝣naiad的流体动力学本研究的重点是蜉蝣naiad（若虫）作为一种可能的生物模型，在低到中等雷诺数的流动中有效地产生外部循环电流。蜉蝣的一个显著特征是在腹部的侧背区域有7对鳃板，在许多物种中，鳃板以一种超时间的方式主动跳动，以产生外部电流。这种外部通风有助于新鲜含氧水的循环，使蜉蝣能够忍受氧浓度的波动。为了最大限度地提高在缺氧条件下的生存能力，人们会推测这种通风流应该以最小的能量消耗最大化对流流量。了解这个活体平台的流动机制也可以为未来几代自主微传感器平台的对流流生成优化提供有用的见解。PI计划确定一组振荡元件如何在粘性主导和惯性主导之间转换时有效地最大化循环电流的产生，并确定振荡附件的性能如何受到结构灵活性和流固耦合响应的影响。这项工作的广泛影响将跨越几个领域，包括开发适合设计用于快速可靠的化学和生物传感器网络的新型通风装置的知识库。高中生与大学生在研究中的有意义整合。该项目将作为一个激励因素，通过在UMD举办的年度暑期项目中向高中毕业生介绍工程科学的研究方面。最后，本研究中要回答的问题将构成机械工程系最近开设的高级生物力学课程的基础材料。

PROPOSAL NUMBER: CBET - 0730907 PRINCIPLE INVESTIGATOR: Kiger, Kenneth T. INSTITUTION: University of Maryland College Park Biomimetic pumping by active gill plate arrays: the fluid dynamics of mayfly naiadsThis study focuses on mayfly naiads (nymphs) as a possible biological model for the efficient generation of external circulation currents in low to intermediate Reynolds number flows. A distinctive feature of the mayfly naiad is the presence of 7 pairs of gill plates on the lateral dorsal region of the abdomen, which in many species actively beat in a metachronal fashion to produce an external current. This external ventilation aids in the circulation of fresh oxygenated water and allows mayflies to tolerate fluctuations in oxygen concentrations. To maximize the ability to survive in poorly oxygenated conditions, one would speculate that such ventilation currents should maximize the convective flow rate with minimal energy consumption. Understanding the flow mechanics of this living platform may then also provide useful insights for the optimization of convective flow generation for future generations of autonomous micro-sensor platforms. The PI plans to determine how an array of oscillating elements effectively maximize the production of a circulation current as it transitions between a viscous-dominated and an inertia-dominated regime and determine how the performance of an oscillating appendage affected by structural flexibility and the coupled response dictated by the fluid-structure interaction. The broader impacts of the work will span several areas, including the development of a knowledge base appropriate for the design of novel ventilation devices for fast and reliable chemical and biosensor networks. Meaningful Integration of High School and Undergraduate Students in Research. The project will serve as a motivational component for describing the research aspects of engineering science to High School seniors through presentation in an annual summer program host at UMD. Finally, the questions to be answered in this research will form the basis of material to be included in a recently created upper level biomechanics course offered within the Department of Mechanical Engineering.