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Ezerskij A. B., Paranthoen P. Topological defects in Karman street behind heated cylinder. Izvestiya VUZ. Applied Nonlinear Dynamics, 2002, vol. 10, iss. 6, pp. 109-121. DOI: 10.18500/0869-6632-2002-10-6-109-121

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Topological defects in Karman street behind heated cylinder

Ezerskij Aleksandr Borisovich, Institute of Applied Physics of the Russian Academy of Sciences
Paranthoen Pierre, Centre national de la recherche scientifique

In experiments it was found that heating of a cylinder streamlined by an air flow cause appearance of phase and amplitude modulations in a laminar Karman street. It was shown that an increase of phase modulation downstream results in appearance of topological defects in a spatially periodic structure of a vortex street. Statistical properties of such defects were studied.

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The authors are grateful to J.-K. Lecordier for discussing the results and helping with the experiments, and to J. Malkov for his help in writing programs to process the results using the Hilbert transform. A.B.Ezersky is grateful to CNRS for the opportunity to study the vortex dynamics in the CORIA-UMR 6614 laboratory.

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