湍流
粒子跟踪测速
跟踪(教育)
物理
喷射(流体)
粒子图像测速
测速
人工神经网络
流量(数学)
粒子(生态学)
机械
声学
计算机科学
人工智能
地质学
海洋学
教育学
心理学
作者
Shengze Cai,Charles A. Gray,George Em Karniadakis
出处
期刊:IEEE Transactions on Instrumentation and Measurement
[Institute of Electrical and Electronics Engineers]
日期:2024-01-01
卷期号:: 1-1
标识
DOI:10.1109/tim.2024.3398068
摘要
Particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are important flow visualization technologies for measuring global velocity fields in a non-intrusive manner. However, they are limited by the spatial resolution of the measurement, and they require further post-processing steps to refine the flow fields. To this end, we employ a deep learning method, physics-informed neural networks (PINNs), which can integrate the sparse velocity measurements from PIV or PTV with the governing equations of the fluid flow by a neural network. A real experiment, where the tomographic PTV setup is applied to measure the three-dimensional turbulent jet flow, is considered to evaluate the proposed method. We perform a systematic study based on the experimental data, demonstrating that the PINN-enhanced velocimetry approach can yield super-resolution for the velocity vectors, hence demanding only of the order of 100 vectors per snapshot compared to 16,500 vectors at full resolution. In addition, PINNs infer the pressure field without providing any pressure information. The proposed algorithm can be readily implemented with the existing PIV/PTV software, providing a standard method for greatly enhancing experimental data in fluid dynamics.
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