Average corotation of line segments near a point and vortex identification

Kód výsledku v IS VaVaI

RIV/67985840:_____/13:00398283 - isvavai.cz

Nalezeny alternativní kódy

RIV/67985874:_____/13:00398283

Výsledek na webu

http://dx.doi.org/10.2514/1.J052330

DOI - Digital Object Identifier

10.2514/1.J052330

Jazyk výsledku

angličtina

Název v původním jazyce

Average corotation of line segments near a point and vortex identification

Popis výsledku v původním jazyce

An easy-to-interpret kinematic quantity measuring the average corotation of material line segments near a point is introduced and applied to vortex identification. At a given point, the vector of average corotation of line segments is defined as the average of the instantaneous local rigid-body rotation over ?all planar cross sections passing through the examined point. The vortex-identification method based on average corotation is a one-parameter, region-type local method sensitive to the axial stretching rate as well as to the inner configuration of the velocity gradient tensor. The method is derived from a well-defined interpretation of the local flow kinematics to determine the ?plane of swirling and is also applicable to compressible and variable-density flows. Practical application to direct numerical simulation datasets includes a hairpin vortex of boundary-layer transition, the reconnection process of two Burgers vortices, a flow around an inclined flat plate, and a flow aroun

Název v anglickém jazyce

Average corotation of line segments near a point and vortex identification

Popis výsledku anglicky

An easy-to-interpret kinematic quantity measuring the average corotation of material line segments near a point is introduced and applied to vortex identification. At a given point, the vector of average corotation of line segments is defined as the average of the instantaneous local rigid-body rotation over ?all planar cross sections passing through the examined point. The vortex-identification method based on average corotation is a one-parameter, region-type local method sensitive to the axial stretching rate as well as to the inner configuration of the velocity gradient tensor. The method is derived from a well-defined interpretation of the local flow kinematics to determine the ?plane of swirling and is also applicable to compressible and variable-density flows. Practical application to direct numerical simulation datasets includes a hairpin vortex of boundary-layer transition, the reconnection process of two Burgers vortices, a flow around an inclined flat plate, and a flow aroun

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BA - Obecná matematika

OECD FORD obor

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Projekt

IAA200600801: Dekompoziční metody pro analýzu proudových polí

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

AIAA Journal

ISSN

0001-1452

e-ISSN

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Svazek periodika

51

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

2678-2694

Kód UT WoS článku

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EID výsledku v databázi Scopus

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