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- W2610079553 abstract "We review and test twelve different approaches to the detection of finite-time coherent material structures in two-dimensional, temporally aperiodic flows. We consider both mathematical methods and diagnostic scalar fields, comparing their performance on three benchmark examples: the quasiperiodically forced Bickley jet, a two-dimensional turbulence simulation, and an observational wind velocity field from Jupiter's atmosphere. A close inspection of the results reveals that the various methods often produce very different predictions for coherent structures, once they are evaluated beyond heuristic visual assessment. As we find by passive advection of the coherent set candidates, false positives and negatives can be produced even by some of the mathematically justified methods due to the ineffectiveness of their underlying coherence principles in certain flow configurations. We summarize the inferred strengths and weaknesses of each method, and make general recommendations for minimal self-consistency requirements that any Lagrangian coherence detection technique should satisfy." @default.
- W2610079553 created "2017-05-05" @default.
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- W2610079553 date "2017-05-01" @default.
- W2610079553 modified "2023-09-30" @default.
- W2610079553 title "A critical comparison of Lagrangian methods for coherent structure detection" @default.
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- W2610079553 doi "https://doi.org/10.1063/1.4982720" @default.
- W2610079553 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28576102" @default.
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