title: Scattering of sound by a vorticity filament: an experimental and numerical investigation.
abstract: 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.
authors: 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
authors: S
authors: S
authors: Manneville
authors: P
authors: P
authors: Roux
authors: M
authors: M
authors: Tanter
authors: A
authors: A
authors: Maurel
authors: M
authors: M
authors: Fink
authors: F
authors: F
authors: Bottausci
authors: P
authors: P
authors: Petitjeans