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arXiv · 1907.09766

Particle streak velocimetry using Ensemble Convolutional Neural Networks

Alexander V. Grayver·Jerome Noir
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Abstract

This study reports an approach and presents its open-source implementation for quantitative analysis of experimental flows using streak images and Convolutional Neural Networks (CNN). The latter are applied to retrieve a length and an angle from streaks, which can be used to deduce kinetic energy and directionality (up to 180$^{\circ}$ ambiguity) of an imaged flow. We developed a quick method for generating essentially unlimited number of training and validation images, which enabled efficient training. Additionally, we show how to apply an ensemble of CNNs to derive a formal uncertainty on the estimated quantities. The approach is validated on the numerical simulation of a convenctive turbulent flow and applied to a longitutidal libration flow experiment.

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Alexander V. Grayver, Jerome Noir. 2019-07-23. Particle streak velocimetry using Ensemble Convolutional Neural Networks. https://doi.org/10.1007/s00348-019-2876-1

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