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Fast acoustic streaming in standing waves : Generation of an additional outer streaming cell

Article dans une revue avec comité de lecture
Author
REYT, Ida
247329 Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur [LIMSI]
BAILLIET, Hélène
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
MOREAU, Solène
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
VALIERE, Jean-Christophe
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
BALTEAN-CARLÈS, Diana
WEISMAN, Catherine
ccDARU, Virginie
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/8595
Date
2013
Journal
Journal of the Acoustical Society of America

Abstract

Rayleigh streaming in a cylindrical acoustic standing waveguide is studied both experimentally and numerically for nonlinear Reynolds numbers from 1 to 30. Streaming velocity is measured by means of laser Doppler velocimetry in a cylindrical resonator filled with air at atmospheric pressure at high intensity sound levels. The compressible Navier-Stokes equations are solved numerically with high resolution finite difference schemes. The resonator is excited by shaking it along the axis at imposed frequency. Results of measurements and of numerical calculation are compared with results given in the literature and with each other. As expected, the axial streaming velocity measured and calculated agrees reasonably well with the slow streaming theory for small ReNL but deviates significantly from such predictions for fast streaming (ReNL > 1). Both experimental and numerical results show that when ReNL is increased, the center of the outer streaming cells are pushed toward the acoustic velocity nodes until counter-rotating additional vortices are generated near the acoustic velocity antinodes.

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