Abstract
The instability of a vortex subject to a stationary n-fold constraint is studied experimentally. Such a vortex is obtained by the rotation of a deformable cylinder wall on which two or three rolls are pressed. The two control parameters of the flow are the aspect ratio and the Reynolds number. Different regimes of instability are observed in the parameter space. The wavelength and frequency of the resulting three-dimensional unstable mode are measured by visualization and compared to theoretical predictions.
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Eloy, C., Gal, P.L., Dizès, S.L. (2000). Experimental Observation of the Multipolar Instability Inside a Deformed Elastic Cylinder. In: Maurel, A., Petitjeans, P. (eds) Vortex Structure and Dynamics. Lecture Notes in Physics, vol 555. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44535-8_8
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DOI: https://doi.org/10.1007/3-540-44535-8_8
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