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Description
  • Coherent structures are not included in practically useful models of turbulence due to scarcity of data upon which the modelling could be based. The problem is indistinct, vague, and continuously varying boundary of each structure, making difficult even identification of its very existence. The introduced identification method operates with a pair of flow visualisation images, computing local correlation coefficients in sequentially interrogated small image parts. The coherence is revealed by high local values of the coefficient. There are two variants, a scalar and vector approaches. The method is shown applied to an experiment in which the structures play an important role.
  • Coherent structures are not included in practically useful models of turbulence due to scarcity of data upon which the modelling could be based. The problem is indistinct, vague, and continuously varying boundary of each structure, making difficult even identification of its very existence. The introduced identification method operates with a pair of flow visualisation images, computing local correlation coefficients in sequentially interrogated small image parts. The coherence is revealed by high local values of the coefficient. There are two variants, a scalar and vector approaches. The method is shown applied to an experiment in which the structures play an important role. (en)
Title
  • Identification of coherence in turbulent flows by local correlations
  • Identification of coherence in turbulent flows by local correlations (en)
skos:prefLabel
  • Identification of coherence in turbulent flows by local correlations
  • Identification of coherence in turbulent flows by local correlations (en)
skos:notation
  • RIV/61388998:_____/14:00430510!RIV15-GA0-61388998
http://linked.open...avai/riv/aktivita
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  • I, P(GA13-23046S)
http://linked.open...vai/riv/dodaniDat
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  • 20273
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  • RIV/61388998:_____/14:00430510
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  • coherence; coherent structures; turbulence (en)
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  • [53374CC60B15]
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  • Holany-Litice
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  • Praha
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  • 28th Symposium on Anemometry
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  • Tesař, Václav
  • Něnička, Václav
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number of pages
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  • Institute of Hydrodynamics ASCR, v. v. i.
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  • 978-80-87117-11-8
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