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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Print: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v17.i3.70
pages 267-279

STABILITY OF A SWIRLING ANNULAR FLOW

Frantisek Marsik
Institute of Thermomechanics, Czech Academy of Sciences, Dolejskova 5, 182 00 Prague 8, Czech Republic
Zdenek Travnicek
Institute of Thermomechanics of the Czech Academy of Sciences
P. Novotny
Institute of Thermomechanics AS CR, v.v.i., Dolejskova 5, 18200 Prague
E. Werner
nstitute of Aerospace Thermodynamics (ITLR), Universität Stuttgart, Germany,

ABSTRACT

The influence of rotation on the stability of coaxial flow between steady cylinders is still an open question. The pattern of a swirling annular jet depends strongly on the quality of the issuing flow. Our new approach to the fluid flow stability problem is based on the attenuation of the kinetic energy of disturbances. This concept follows from the thermodynamic stability conditions. To show the ability of this new concept we concentrate on an isothermal swirl flow in a coaxial tube with constant density and viscosity.


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