Three-dimensional particle tracking velocimetry using shallow neural network for real-time analysis

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Three-dimensional particle tracking velocimetry (3D-PTV) technique is widely used to acquire the complicated trajectories of particles and flow fields. It is known that the accuracy of 3D-PTV depends on the mapping function to reconstruct three-dimensional particles locations. The mapping function becomes more complicated if the number of cameras is increased and there is a liquid–vapor interface, which crucially affect the total computation time. In this paper, using a shallow neural network model, we dramatically decrease the computation time with a high accuracy to successfully reconstruct the three-dimensional particle positions, which can be used for real-time particle detection for 3D-PTV. The developed technique is verified by numerical simulations and applied to measure a complex solutal Marangoni flow patterns inside a binary mixture droplet.

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National Research Foundation of Korea (NRF) (NRF-2019R1A2C2003176 and NRF-2018R1C1B6004190)

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Correspondence to Hyoungsoo Kim or Han Seo Ko.

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Gim, Y., Jang, D.K., Sohn, D.K. et al. Three-dimensional particle tracking velocimetry using shallow neural network for real-time analysis. Exp Fluids 61, 26 (2020).

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