MRI: Acquisition of a High-Speed Particle Image Velocimetry Instrument

该合同将用于获得高速粒子图像测速（PIV）系统，用于在圣何塞州立大学进行最先进的流体成像。高速PIV是一种先进的技术，它结合了激光和高帧率的相机来绘制流场。该系统包括用于测量三维速度分量的立体PIV和用于成像两相微流体系统的双色微尺度PIV。这种先进的仪器将促进广泛关键应用的创新研究，包括生物医学设备、生化分析和可持续供暖、通风和空调技术。此外，PIV系统将整合到本科和研究生阶段的教育活动和学生项目中，以加强学生在微流体和计算流体动力学课程中的动手学习。与校园和其他区域组织的感兴趣的研究人员共享PIV系统将促进科学研究。c协作。高速PIV系统将使生物流体力学、湍流和微流体学的高影响实验研究成为可能。以下是利用拟议工具开展的研究项目的例子。(1)研究新型三瓣机械主动脉瓣的血流动力学性能，改进下一代人工主动脉瓣的设计。(2)自然通风湍流及自然风湍流对建筑物内空气交换速率的影响研究。(3)支架血栓形成研究，了解支架支撑物附近壁面剪切应力与血栓形成的关系。(4)利用双色微尺度PIV研究微液滴在狭窄通道中的稳定性。(5)研究颗粒在多孔介质中的迁移率，发展电泳油墨技术。这些研究项目的成功将依赖于所提出的高速PIV系统的获得。

This award will be used to acquire a high-speed particle image velocimetry (PIV) system for conducting state-of-the-art fluid imaging at San Jose State University. High-speed PIV is an advanced technique that uses a combination of laser light and cameras with high frame rate to map the flow field. The system includes stereoscopic PIV for measuring three-dimensional velocity components and two-color microscale PIV for imaging two-phase microfluidic systems. This advanced instrumentation will facilitate innovative research on wide-ranging critical applications, including biomedical devices, biochemical analysis, and sustainable heating, ventilation and air conditioning technologies. In addition, the PIV system will be integrated into educational activities and student projects at both undergraduate and graduate levels to enhance hands-on student learning in microfluidics and computational fluid dynamics courses. Sharing the PIV system with interested researchers on campus and other regional organizations will foster scientific collaboration.The high-speed PIV system will enable high-impact experimental research in biofluid mechanics, turbulence and microfluidics. Examples of research projects enabled by the proposed instrument are as follows. (1) Investigation of the hemodynamic performance of novel trileaflet mechanical aortic valves for improving the design of next-generation prosthetic aortic valves. (2) Study on turbulence in natural ventilation and effects of naturally-occurring wind turbulence on the exchange rate of air in buildings. (3) Study on stent thrombosis to understand the relationship between wall shear stress near stent struts and thrombus formation. (4) Investigation of micro-droplet stability in constricted channels using two-color microscale PIV. (5) Study of particle mobility through porous media for the development of electrophoretic ink technology. The success of these research projects will rely on the acquisition of the proposed high-speed PIV system.