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

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v23.i1-2.100
pages 96-100

Evolution of Perturbations in Circular Couette Flow at Subcritical Taylor Numbers

O. D. Nikishova
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

ABSTRAKT

A finite-difference solution of Navier-Stokes equations is employed to demonstrate that axisymmetrical perturbations imposed onto a circular Couette flow at Ta < Tacr are restructured into structures typical of Taylor vortices; this is followed by rapid damping of the latter over a time of the order of 0.01 cylinder rotations. Here, if the initial perturbation is sufficiently strong, the magnitude of the local shear stress undergoes a short-period change along the axis.


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