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Communication Dans Un Congrès Année : 2012

Acoustic properties of emulsions with locally resonant scatterers

Benoit Mascaro
  • Fonction : Auteur
  • PersonId : 939567
Simon Raffy
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  • PersonId : 939568
Olivier Mondain-Monval
Jacques Leng
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  • PersonId : 836351
Olivier Poncelet
Christophe Aristégui
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  • PersonId : 859117

Résumé

We present the results of ultrasonic pulse propagation experiments on dilute emulsions of resonant scatterers. Thanks to microfluidics, we achieved highly monodisperse oil-droplet dispersions embedded in a Bingham fluid. Underwater measurements allowed us to evidence up to about ten sharp Mie resonances, on both the acoustic attenuation and the phase velocity in the MHz range. These ultrasonic experiments are compared to theoretical predictions derived within the framework of the independent scattering approximation with an excellent quantitative agreement. The influence of the emulsion polydispersity is also investigated as well as the dependence of the acoustic properties on both size droplet and volume fraction in dilute regimes, for which the coupling between scatterers is negligible.
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Dates et versions

hal-00810954 , version 1 (23-04-2012)

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  • HAL Id : hal-00810954 , version 1

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Thomas Brunet, Benoit Mascaro, Simon Raffy, Olivier Mondain-Monval, Jacques Leng, et al.. Acoustic properties of emulsions with locally resonant scatterers. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810954⟩
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