A note on integral vortex strength

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Title:A note on integral vortex strength
Creators:
Kolář, Václav; kolar at ih dot cas dot cz; Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, 166 12 Prague 6, Czech Republic
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 58, 1, pp. 23-28
Uncontrolled Keywords:Circulation, Unsteady Taylor Vortex, Vortex Intensity, Vortex Strength, Vorticity, Vorticity Decomposition

Abstract

Controversial aspects of the conventional and widely used concept of the integral vortex strength are briefly discussed. The strength of a vortex is usually calculated as the circulation along the vortex boundary, or equivalently due to Green’s theorem, as the surface integral of vorticity over the planar vortex cross section. However, the local effect of an arbitrary "superimposed shear" is fully absorbed by vorticity what makes the circulation a shear-biased vortex characteristic. The present paper shows that different vortex-strength models can be derived on the basis of different local vortex intensities proposed in the literature. The outcome of these models naturally differs, even for an ideally axisymmetric vortex. Three different vortex-strength models are compared and discussed by examining the unsteady Taylor vortex.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:A note on integral vortex strength
Translated title:Poznámka o integrální síle víru
Creators:
Kolář, Václav; kolar at ih dot cas dot cz; Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, 166 12 Prague 6, Czech Republic
Uncontrolled Keywords:Circulation, Unsteady Taylor Vortex, Vortex Intensity, Vortex Strength, Vorticity, Vorticity Decomposition
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:58
Number:1
Page Range:pp. 23-28
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:6096
Item Type:Article
Deposited On:15 Jun 2010 17:03
Last Modified:15 Jun 2010 15:03

Citation

Kolář, Václav (2010) A note on integral vortex strength. Journal of Hydrology and Hydromechanics, 58 (1). pp. 23-28. ISSN 0042-790X

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