Počet záznamů: 1

A note on integral vortex strength

  1. 1.
    0340294 - UH-J 2010 RIV SK eng J - Článek v odborném periodiku
    Kolář, Václav
    A note on integral vortex strength.
    Journal of Hydrology and Hydromechanics. Roč. 58, č. 1 (2010), s. 23-28 ISSN 0042-790X
    Grant CEP: GA AV ČR IAA200600801
    Výzkumný záměr: CEZ:AV0Z20600510
    Klíčová slova: circulation * unsteady Taylor vortex * vortex intensity * vortex strength * vorticity * vorticity decomposition
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 0.553, rok: 2010

    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 vortexstrength 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.
    Trvalý link: http://hdl.handle.net/11104/0005764
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