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Compressibility effect in vortex identification

SYSNO ASEP	0321273
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Compressibility effect in vortex identification
Title	Efekt stlačitelnosti při identifikaci víru
Author(s)	Kolář, Václav (UH-J)_{SAI, ORCID, RID}
Source Title	AIAA Journal - ISSN 0001-1452 Roč. 47, č. 2 (2009), s. 473-475
Number of pages	3 s.
Publication form	on-line - on-line
Language	eng - English
Country	US - United States
Keywords	vortex ; vortex identification ; compressible flows ; compressibility effect
Subject RIV	BK - Fluid Dynamics
R&D Projects	IAA200600801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z20600510 - UH-J (2005-2011)
UT WOS	000263047200018
DOI	10.2514/1.40131
Annotation	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.
Workplace	Institute of Hydrodynamics
Contact	Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003
Year of Publishing	2009

Number of the records: 1