Vortex and the Balance between Vorticity and Strain Rate

Autor:	Václav Kolář, Jakub Šístek
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Motor vehicles. Aeronautics. Astronautics TL1-4050
Zdroj:	International Journal of Aerospace Engineering, Vol 2019 (2019)
Druh dokumentu:	article
ISSN:	1687-5966 1687-5974
DOI:	10.1155/2019/1321480
Popis:	A new analysis of the vortex-identification Q-criterion and its recent modifications is presented. In this unified framework based on different approaches to averaging of the cross-sectional balance between vorticity and strain rate in 3D, new relations among the existing modifications are derived. In addition, a new method based on spherical averaging is proposed. It is applicable to compressible flows, and it inherits a duality property which allows its use for identifying high strain-rate zones together with vortices. The new quantity is applied to identification of vortices and high strain-rate zones in the flow around an inclined flat plate, in the flow past a sphere, and for the reconnection process of two Burgers vortices.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/201941b3443e49798060d718748a2108 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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