Scattering of sound by a vorticity filament: an experimental and numerical investigation.
A vorticity filament is investigated experimentally using the transmission of an ultrasonic wave through the flow. The analysis of the wave-front distortion provides noninvasive measurements of the vortex circulation and size. The latter is estimated by analytical calculations of the scattering of a plane wave by a vorticity filament. The case of a cylindrical wave incident on a vortex leads to similar experimental results which are successfully compared to a parabolic equation simulation. Finally, a finite-difference code based on linear acoustics is presented, in order to investigate the structure of the scattered wave numerically.
Manneville
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Laboratoire Ondes et Acoustique, Université Denis Diderot, CNRS UMR No. 7587, Ecole Supérieure de Physique et Chimie Industrielles, 10 rue Vauquelin, 75005 Paris, France. sebastien.manneville@espci.fr
Roux
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Tanter
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Maurel
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Fink
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Bottausci
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Petitjeans
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