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AI-based method of vortex core tracking as an alternative for Lambda2

Majchrzak Maciej, Jakubowski Mateusz, Starosta Roman

Vibrations in Physical Systems

2020

Vol. 31, nr 3

art. no. 2020319

The paper presents a new method of vortex core detection developed for use in CFD simulation result analysis. Apart from the conventional approach involving vector algebra, mainly the Lambda2 method, it focuses on the identification of certain features in a graphic representation of the velocity field. It is done by generating a series of slices of the said field in the postprocessing software and training a Convolutional Neural Network (AI) to recognize vortex cores. The neural network can be integrated into a simple python program and used to quickly identify vortex cores on a large number of images and translate their locations to coordinates of a CFD model for visualisation.