title: Cyclones and attractive streaming generated by acoustical vortices.
abstract: Acoustical and optical vortices have attracted great interest due to their ability to capture and manipulate particles with the use of radiation pressure. Here we show that acoustical vortices can also induce axial vortical flow reminiscent of cyclones, whose topology can be controlled by adjusting the properties of the acoustical beam. In confined geometry, the phase singularity enables generating "attractive streaming" with the flow directed toward the transducer. This opens perspectives for contactless vortical flow control.
authors.affiliation: Institut d'Electronique, de Microélectronique et Nanotechnologie (IEMN), LIA LICS, Université Lille 1 and EC Lille, UMR CNRS 8520, 59652 Villeneuve d'Ascq, France and CNRS UMR 7588, UPMC Université Paris 06, Institut des NanoSciences de Paris (INSP), F-75005 Paris, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Riaud
authors.affiliation: Institut d'Electronique, de Microélectronique et Nanotechnologie (IEMN), LIA LICS, Université Lille 1 and EC Lille, UMR CNRS 8520, 59652 Villeneuve d'Ascq, France.
authors.forename: Michael
authors.initials: M
authors.lastname: Baudoin
authors.affiliation: CNRS UMR 7588, UPMC Université Paris 06, Institut des NanoSciences de Paris (INSP), F-75005 Paris, France.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Thomas
authors.affiliation: Institut d'Electronique, de Microélectronique et Nanotechnologie (IEMN), LIA LICS, Université Lille 1 and EC Lille, UMR CNRS 8520, 59652 Villeneuve d'Ascq, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Bou Matar
mesh_terms: D000162:Acoustics; D055867:Cyclonic Storms; D008962:Models, Theoretical