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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v30.i2.50
3 pages

Experimental Investigations of the Vortex Ring Transformation in a Laminar Stratified Shear Flow

O. D. Nikishova
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
V. I. Nikishov
Institute of Hydromechanics of National Academy of Sciences of Ukraine, 8/4, Zhelyabov St., Kyiv, 03057, Ukraine
V. V. Oleksiuk
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

RÉSUMÉ

The results of the experimental investigations of the transformation of vortex structures (vortex rings) in a laminar shear stratified flow are presented. The stratification is shown to reduce a height of lift of the vortex ring ejected in the vertical direction across the flow. It is found that the behavior of the vortex rings in a shear flow differs drastically from the behavior of the same rings in a stationary fluid. It is demonstrated that two solitary waves traveling along the core of a ring in the opposite directions appear induced by the effect of shear. This leads to the scattering of the rings' trajectories.


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