MRI: Acquisition of a High-Speed Camera for a Primarily Undergraduate Institution

MRI：为本科院校采购高速摄像机

• 批准号: 2018150
• 负责人: Mehdi Mortazavi
• 金额: $ 5.33万
• 依托单位: Western New England University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018150&HistoricalAwards=false
• 关键词: MRI; Acquisition; Speed; Camera; Primarily

This NSF Major Research Instrumentation award will support the acquisition of a Phantom VEO 640L high-speed camera which is a critical research instrument toward cutting-edge research and education across campus at Western New England University (WNE), particularly within the departments of Mechanical Engineering and Biomedical Engineering. The speed, resolution, and memory of this camera will enable researchers at WNE to conduct pioneering research in the areas of energy-thermo-fluids, material science, and biomedical engineering. WNE is a primarily undergraduate institution, with a high proportion of first-generation, minority, and non-traditional students. This project will provide research experiences to undergraduates and will open doors for additional research opportunities thereafter, especially for women and minorities. The proposed equipment will enhance WNE's engineering curriculum as undergraduate research activities are integrated in senior design projects. In addition, it will provide research training opportunities for students who will be involved in the proposed research activities. Moreover, the proposed work will increase partnership between academia and industry.The high-speed camera will be used to advance knowledge in transport phenomena in proton exchange membrane (PEM) fuel cells, shear stress distribution of a mechanical pulsating jet, nanomanufacturing of silica-coated nanoparticles, and diagnostic tests for neglected infectious disease. The studies on PEM fuel cells transport phenomena will include; (i) liquid water droplet deformation and removal on the surface of the gas diffusion layer and under the influence of acoustic pressure waves, (ii) variation of liquid-gas two-phase flow pressure drop in PEM fuel cell flow channel during emergence and growth of liquid water droplets, (iii) deformation of liquid water droplet under mechanical vibrations in PEM fuel cells, and (iv) destabilized capillary-scale two-phase flow in microchannels. All of these phenomena occur in orders of milliseconds and therefore, studying them will require high-speed imaging. The shear stress distribution of a mechanical pulsating jet will be investigated by measuring the spatial and temporal shear stress distribution on a flat surface at various Reynolds numbers, stand-off distances, pulsating frequencies and nozzle exit speeds. The findings will be used to further improve the performance of the impinging jet for various applications and to validate numerous numerical studies on this topic. The high-speed camera will also be used to study the capillary fluid instabilities during Nanomanfucaturing of silica-coated nanoparticles using Electrospraying, which holds great promise to solve the long-standing scalability issue in manufacturing of advanced structured nanomaterials. In the Department of Biomedical Engineering, microfluidic flows will be studied to achieve enhanced sample preparation performance in diagnostic tests for neglected infectious diseases. The results obtained in this study can be a transformational factor for this particular application as well as across a number of point-of-care microfluidic platforms for use in low-resource environments.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项NSF重大研究仪器奖将支持幻影VEO 640L高速摄像机的采购，该摄像机是西新英格兰大学（WNE）校园内前沿研究和教育的关键研究仪器，特别是在机械工程和生物医学工程系。这台相机的速度、分辨率和内存将使WNE的研究人员能够在能量-热流体、材料科学和生物医学工程领域进行开创性的研究。WNE主要是一所本科院校，第一代、少数民族和非传统学生的比例很高。该项目将为本科生提供研究经验，并为以后的其他研究机会打开大门，特别是为妇女和少数民族。拟议的设备将加强WNE的工程课程，因为本科生的研究活动与高级设计项目相结合。此外，它将为参与拟议研究活动的学生提供研究培训机会。此外，拟议的工作将加强学术界和工业界之间的伙伴关系。高速摄像机将用于推进质子交换膜（PEM）燃料电池中的传输现象、机械脉冲射流的剪切应力分布、二氧化硅涂层纳米颗粒的纳米制造以及被忽视的传染病的诊断测试等方面的知识。PEM燃料电池输运现象的研究将包括；(i)声压波作用下气体扩散层表面液态水滴的变形和去除，（ii）液态水滴出现和生长过程中PEM燃料电池流道内液气两相流压降的变化，（iii） PEM燃料电池内液态水滴在机械振动下的变形，（iv）微通道内毛细尺度两相流的不稳定。所有这些现象都发生在几毫秒内，因此，研究它们将需要高速成像。通过测量不同雷诺数、距离、脉动频率和喷嘴出口速度下平面上的时空剪应力分布，研究了机械脉冲射流的剪应力分布。研究结果将用于进一步提高各种应用的冲击射流性能，并验证关于该主题的许多数值研究。高速摄像机还将用于研究电喷涂二氧化硅包覆纳米颗粒纳米制造过程中的毛细管流体不稳定性，这有望解决先进结构纳米材料制造中长期存在的可扩展性问题。在生物医学工程系，将研究微流体流动，以提高在被忽视的传染病诊断测试中的样品制备性能。在这项研究中获得的结果可以是这种特殊应用的变革因素，以及在低资源环境中使用的许多护理点微流控平台。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Transient two-phase flow pressure drop during droplet emergence and growth in gas flow channels

气流通道中液滴出现和生长过程中的瞬态两相流压降

• 发表时间: 2021
• 期刊: Proceedings of the ASME 2021 International Mechanical Engineering Congress & Exposition
• 作者: Mortazavi, M;Watkins, C;Murchie, C
• 通讯作者: Murchie, C

Dynamics of droplets in core gas flow superimposed with acoustic pressure waves

声压波叠加的核心气流中液滴的动力学

• 发表时间: 2021
• 期刊: Proceedings of the ASME 2021 International Mechanical Engineering Congress & Exposition
• 作者: Mortazavi, M;Pedley, T
• 通讯作者: Pedley, T

Droplet dynamics in PEM fuel cell flow channels

PEM 燃料电池流道中的液滴动力学

• 发表时间: 2021
• 期刊: Proceedings of the ASME 2021 International Mechanical Engineering Congress & Exposition
• 作者: Mortazavi, M;Chauhan, V;Pedley, T;Whinery, B
• 通讯作者: Whinery, B