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Erschienen in: Experiments in Fluids 5/2008

01.11.2008 | Research Article

An automated vortex detection scheme using the wavelet transform of the d 2 field

verfasst von: A. V. Varun, K. Balasubramanian, R. I. Sujith

Erschienen in: Experiments in Fluids | Ausgabe 5/2008

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Abstract

A vortex detection scheme using the wavelet transform of the discriminant of the eigenvalues of the velocity gradient matrix (d 2) is presented in this paper. The use of d 2 field results in better eduction capability over the previously used test fields such as enstrophy since it automatically distinguishes shear layers from vortices. Level sets are used to refine the shape of the vortex without causing a huge computational penalty. Further, the algorithm is easily automated to aid batch processing. The detection scheme was applied to swirl flow fields, successfully estimating the vortex location, the core radius and the vortex shape.

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Metadaten
Titel
An automated vortex detection scheme using the wavelet transform of the d 2 field
verfasst von
A. V. Varun
K. Balasubramanian
R. I. Sujith
Publikationsdatum
01.11.2008
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 5/2008
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-008-0505-5

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