High-Speed Tomographic and Three-Dimensional (3D) Imaging System

传统上，实验测量是在一个或两个空间维度上进行的，尽管大多数物理机制本质上是三维的。测量技术也可能缺乏所需的采集频率来捕捉现象的时间演变。在过去的十年里，随着基于图像的诊断和计算资源的进步，人们对物理机制的时空演变的有限访问逐渐增加。这款RTI应用程序要求支持三个新的高速摄像头，以形成最先进的四摄像头高速层析和三维成像系统。所要求的设备将补充目前可用的资源，包括PI的高重复频率激光器、高速同步设备、断层图像处理软件，以及由共同申请者之一提供的第四台相机。该设备可配置为不同的测量系统，包括高速层析粒子图像测速仪(TOMO-PIV)、三维粒子跟踪测速仪(3D-PTV)和三维成像。拟议中的设备将成为阿尔伯塔大学工程系流体力学和固体力学学科五个研究项目的基石。研究项目包括(1)泥浆管道中的颗粒传输，(2)湍流中沥青液滴的相互作用，(3)气体在人体呼吸道中的传输和混合，(4)液滴撞击超疏水表面的超快动力学，(5)材料动态破坏的现场可视化。

Experimental measurements are traditionally carried out in one or two spatial dimensions although the majority of physical mechanisms are inherently three-dimensional. Measurement techniques may also lack the required acquisition frequency to capture the temporal evolution of the phenomenon. The limited access to the spatio-temporal evolution of physical mechanisms has been gradually elevated in the last decade by the advances in image-based diagnostics and computing resources. This RTI application requests support for three new high-speed cameras to form state-of-the-art four-camera high-speed tomographic and three-dimensional imaging systems. The requested equipment will supplement the currently available resources including PI's high-repetition laser, a high-speed synchronization device, tomographic image processing software, and the fourth camera provided by one of the co-applicants. The equipment can be configured into different measurement systems including high-speed tomographic particle image velocimetry (tomo-PIV), three-dimensional particle tracking velocimetry (3D-PTV), and three-dimensional imaging. The proposed equipment will become the cornerstone of five research programs in both fluid and solid mechanics disciplines across the Faculty of Engineering of the University of Alberta. The research programs include (1) particle transport in slurry pipelines, (2) interaction of bitumen droplets in turbulent flows, (3) transport and mixing of gases in the airways of the human respiratory tract, (4) ultrafast dynamics of droplet impact on superhydrophobic surfaces, (5) in-situ visualization of the dynamic failure of materials.