Champ diffusé spiralé d'une onde plane acoustique évanescente incidente sur une particule de Mie

ALHAÏTZ, Ludovic; BARESCH, Diego; BRUNET, Thomas; ARISTÉGUI, Christophe; PONCELET, Olivier

doi:10.1088/1742-6596/1761/1/012003

ALHAÏTZ, Ludovic
Institut de Mécanique et d'Ingénierie [I2M]

BARESCH, Diego
Institut de Mécanique et d'Ingénierie [I2M]

BRUNET, Thomas
Institut de Mécanique et d'Ingénierie [I2M]

Langue

Communication dans un congrès avec actes

Ce document a été publié dans

The Anglo-French Physical Acoustics Conference (AFPAC) 2020, Anglo-French Physical Acoustics Conference 2020, 2020-01, Sanderstead. 2021, vol. 1761, p. 012003

IOP Publishing

Résumé en anglais

We consider theoretically the scattering of an incident evanescent plane wave by a spherical particle. The scattering problem is treated in a classic way by applying the T- matrix formalism and the resulting field is expressed on the basis of the different vibration modes of the particle. Compared to the case of a homogeneous plane incident wave, additional azimuthal scattered modes are excited and their contribution provokes a symmetry breaking of the field. Importantly, if a mode is preferentially excited by choosing the corresponding reduced frequency, the scattered radiation exhibits a spiral structure. The scattered field has a rotating phase around the scatterer which comes from the formation of spiral scattered waves and this effect is accentuated by increasing the evanescence degree of the incident wave. These results could have important implications for the contactless manipulation of objects with acoustic radiation forces and torques.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/123916

DOI

http://dx.doi.org/10.1088/1742-6596/1761/1/012003

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295

Voir/Ouvrir

Métadonnées

Partager cette publication !

Licence d’utilisation du document