MRI: Development of Long Distance Microscope Velocimetry System for Bridging Macro and Microscales

MRI：开发连接宏观和微观尺度的长距离显微镜测速系统

• 批准号: 0320327
• 负责人: Ellen Longmire
• 金额: $ 31.2万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0320327&HistoricalAwards=false
• 关键词: MRI; Development; Long; Distance; Microscope

Proposal No. CTS-0320327Principal Investigator: E. Longmire, University of MinnesotaThis grant is for a unique instrumentation system to be developed for simultaneous characterization of microscopic and macroscopic flow evolution. The system will first be used to examine two flows, which by their nature are characterized by a wide range of scales: turbulent and interfacial flows. The system, which will be developed in collaboration with LaVision, Inc, will include the required illumination and imaging optics to apply the Stereo-Particle Imaging velocimetry technique simultaneously at two magnifications and at repetition rates high enough to characterize the flow evolution. In addition, custom calibration targets and software as well as custom analysis software will be developed in order to achieve results of high accuracy in the overlapping smaller and larger fields of view. In the smaller field of view, the system will be able to resolve velocity vectors in areas of (100 square micrometer) or less, while the larger field of view may cover an area of (10 square cm) or more. These aspects will allow for observation and characterization of the evolving microscopic scales in the context of the macroscopic behavior. After the system is developed, it will be employed immediately in studies of turbulent boundary layers and drop coalescence.The instrumentation described will provide revolutionary advances in the understanding of both coalescence at interfaces and the interaction of eddies in turbulent boundary layers. Also, the availability this system will allow for novel and groundbreaking research in additional areas of fluid dynamics including, for example, laminar/turbulent transition, control of macroscopic flows with MEMS, liquid jet and drop break up, three-dimensional instabilities, and turbulent separated flows.The proposed system, which could become a product supported by multiple vendors, is expected to be useful to researchers in many areas of fluid dynamics. At the University of Minnesota, several graduate students will be involved with the proposed system. One will design, develop, and integrate the system hardware and software, and others will use the system for the research projects described above. Also, undergraduate researchers and high school physics teachers, funded by REU and RET supplements, will perform and participate in short-term investigations during the summers. The teachers are expected to bring their experiences with cutting edge measurement techniques and engineering applications back to the classroom.

号提案 CTS-0320327主要研究者： E.朗迈尔，明尼苏达大学这一赠款是一个独特的仪器系统将开发的微观和宏观流动演变的同时表征。 该系统将首先被用来检查两个流，其性质的特点是由一个广泛的规模：湍流和界面流。 该系统将与LaVision公司合作开发，将包括所需的照明和成像光学器件，以两个放大倍率和足够高的重复率同时应用立体粒子成像测速技术来表征流动演变。此外，还将开发定制校准目标和软件以及定制分析软件，以便在重叠的较小和较大视场中实现高精度的结果。在较小的视场中，系统将能够分辨（100平方微米）或更小的区域中的速度矢量，而较大的视场可以覆盖（10平方厘米）或更大的区域。这些方面将允许在宏观行为的背景下观察和表征不断变化的微观尺度。该系统研制成功后，将立即用于湍流边界层和液滴聚结的研究，所述仪器将为理解界面处的聚结和湍流边界层中涡旋的相互作用提供革命性的进展。 此外，该系统的可用性将允许在流体动力学的其他领域进行新颖的和开创性的研究，包括例如层流/湍流过渡、用MEMS控制宏观流动、液体射流和液滴破碎、三维不稳定性和湍流分离流。所提出的系统可能成为多个供应商支持的产品，对流体动力学的许多领域的研究人员都是有用的。在明尼苏达大学，几名研究生将参与拟议中的系统。一个将设计，开发和集成系统的硬件和软件，和其他人将使用该系统的研究项目上述。此外，由REU和RET补充资助的本科研究人员和高中物理教师将在夏季进行并参与短期调查。 教师们将把他们在尖端测量技术和工程应用方面的经验带回课堂。