Bubbly flow velocity measurement in multiple scattering regime

Olivier Lombard; Lilian D'Hondt; Matthieu Cavaro; Serge Mensah; Cédric Payan

doi:10.1016/j.ultras.2019.03.005

Bubbly flow velocity measurement in multiple scattering regime

Ultrasonics. 2019 May:95:63-69. doi: 10.1016/j.ultras.2019.03.005. Epub 2019 Mar 15.

Authors

Olivier Lombard¹, Lilian D'Hondt², Matthieu Cavaro³, Serge Mensah⁴, Cédric Payan⁴

Affiliations

¹ Aix-Marseille Univ, CNRS (UPR 7051), Centrale Marseille, LMA, 13402 Marseille, France. Electronic address: olivier.lombard@u-bordeaux.fr.
² Aix-Marseille Univ, CNRS (UPR 7051), Centrale Marseille, LMA, 13402 Marseille, France; Commissariat à l'énergie atomique et aux énergies alternatives, Cadarache, DEN/DTN/STCP/LISM, Bat 202, 13108 Saint Paul Lez Durance, France.
³ Commissariat à l'énergie atomique et aux énergies alternatives, Cadarache, DEN/DTN/STCP/LISM, Bat 202, 13108 Saint Paul Lez Durance, France.
⁴ Aix-Marseille Univ, CNRS (UPR 7051), Centrale Marseille, LMA, 13402 Marseille, France.

PMID: 30897385
DOI: 10.1016/j.ultras.2019.03.005

Abstract

We propose a technique to measure the velocity of a bubble cloud based on the coda correlation. The method is founded on successive recordings of multiple scattered waves from a bubble cloud. Our model predicts the dependence between the correlation coefficient of these coda waves and the velocity of the bubble cloud under diffusion approximation. The Acoustic experiments are validated by simultaneous optical measurements in a water tank, with a good agreement between the acoustical and the optical methods (relative difference smaller than 7%). This technique can be transposed to any particle flow velocity problems involving multiple scattering effects in acoustics.