Imaging-based 3D particle tracking system for field characterization of particle dynamics in atmospheric flows
Imaging-based 3D particle tracking system for field characterization of particle dynamics in atmospheric flows
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DOI：
10.1007/s00348-023-03619-6
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发表时间：
2022-10
影响因子：
2.4
通讯作者：
N. Bristow;Jiaqi Li;Peter Hartford;M. Guala;Jiarong Hong
中科院分区：
文献类型：
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作者：
N. Bristow;Jiaqi Li;Peter Hartford;M. Guala;Jiarong Hong
提出了一种粒子跟踪测速装置，能够在自然降雪事件中测量大体积的三维粒子轨迹，数量级为几米。在2021/2022冬季，利用该设备进行了旨在了解大气流动中雪沉降运动学的现场实验，并从中获得了初步结果。本文概述了该方法，其中我们使用基于无人机的校准方法，并对选定的数据集进行了分析，以证明该系统在研究大气流动中的惯性粒子动力学方面的能力。采用模块化相机阵列，专为应对降雪期间现场部署的挑战而设计。该成像系统使用无人机携带目标的同步成像进行校准，以便在大约4 m4 m6 m的体积内以距离地面10 m为中心进行测量。利用测量的拉格朗日粒子轨迹，我们给出了有关三维轨迹曲率和加速度统计的数据，以及使用Voronoï分析的聚类行为。在其他惯性粒子应用的背景下，讨论了这种系统的局限性以及潜在的未来发展。
A particle tracking velocimetry apparatus is presented that is capable of measuring three-dimensional particle trajectories across large volumes, of the order of several meters, during natural snowfall events. Field experiments, aimed at understanding snow settling kinematics in atmospheric flows, were conducted during the 2021/2022 winter season using this apparatus, from which we show preliminary results. An overview of the methodology, wherein we use a UAV-based calibration method, is provided, and analysis is conducted of a select dataset to demonstrate the capabilities of the system for studying inertial particle dynamics in atmospheric flows. A modular camera array is used, designed specifically for handling the challenges of field deployment during snowfall. This imaging system is calibrated using synchronized imaging of a UAV-carried target to enable measurements centered 10 m above the ground within approximately a 4 m4 m6 m volume. Using the measured Lagrangian particle tracks, we present data concerning 3D trajectory curvature and acceleration statistics, as well as clustering behavior using Voronoï analysis. The limitations, as well as potential future developments, of such a system are discussed in the context of applications with other inertial particles.