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  • It is shown that from the four most popular vortex-identification schemes (Q, Δ, λ2, and λci) only the Δ-criterion and the associated λci-criterion are extendable to compressible flows. Both criteria fulfill a specific condition conveniently expressed for compressible flows in terms of the invariants of the deviatoric part of the velocity-gradient tensor. It should be noted that if the Q-criterion is a priori redefined in terms of a deviatoric part of the strain-rate tensor, it will also be applicable to compressible flows.
  • It is shown that from the four most popular vortex-identification schemes (Q, Δ, λ2, and λci) only the Δ-criterion and the associated λci-criterion are extendable to compressible flows. Both criteria fulfill a specific condition conveniently expressed for compressible flows in terms of the invariants of the deviatoric part of the velocity-gradient tensor. It should be noted that if the Q-criterion is a priori redefined in terms of a deviatoric part of the strain-rate tensor, it will also be applicable to compressible flows. (en)
  • Je ukázáno, že ze čtyř nejpopulárnějších metod identifikace vírů (Q, Δ, λ2 a λci) pouze Δ-kritérium a přidružené λci-kritérium jsou rozšiřitelné pro stlačitelné proudění. Obě kritéria splňují specifickou podmínku pro stlačitelné proudění vhodně vyjádřenou prostřednictvím invariantů deviatorické části tenzoru rychlostního gradientu. Nutno poznamenat, že pokud Q-kritérium bude a priori předefinováno prostřednictvím deviatorické části tenzoru rychlosti deformace, bude rovněž použitelné pro stlačitelné proudění. (cs)
Title
  • Compressibility effect in vortex identification
  • Compressibility effect in vortex identification (en)
  • Efekt stlačitelnosti při identifikaci víru (cs)
skos:prefLabel
  • Compressibility effect in vortex identification
  • Compressibility effect in vortex identification (en)
  • Efekt stlačitelnosti při identifikaci víru (cs)
skos:notation
  • RIV/67985874:_____/09:00321273!RIV09-AV0-67985874
http://linked.open...avai/riv/aktivita
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  • P(IAA200600801), Z(AV0Z20600510)
http://linked.open...iv/cisloPeriodika
  • 2
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  • 307914
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  • RIV/67985874:_____/09:00321273
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  • vortex; vortex identification; compressible flows; compressibility effect (en)
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  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [897DE0FD8D8A]
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  • AIAA Journal
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  • 47
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  • Kolář, Václav
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  • 000263047200018
http://linked.open...n/vavai/riv/zamer
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  • 0001-1452
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