| Issue |
EPL
Volume 140, Number 4, November 2022
|
|
|---|---|---|
| Article Number | 43001 | |
| Number of page(s) | 5 | |
| Section | Fluid and nonlinear dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/aca25f | |
| Published online | 25 November 2022 | |
Statistics of phase fluctuations of an acoustic wave propagating through a turbulent flow
1 Laboratoire de Physique de l'École Normale Supérieure, CNRS, PSL Research University, Sorbonne Université, Université de Paris - F-75005 Paris, France
2 PMMH, CNRS, ESPCI Paris, Université PSL, Sorbonne Université, Université Paris-Cité - 75005 Paris, France
(a) E-mail: gaurav.bitsp@gmail.com (corresponding author)
Received: 16 August 2022
Accepted: 14 November 2022
We investigate the statistics of phase fluctuations of an acoustic wave propagating through a turbulent flow in line of sight (LOS) configuration. Experiments are performed on a closed von Kármán swirling flow whose boundaries are maintained at a constant temperature. In particular, we analyze the root mean square (RMS) and the power spectrum density (PSD) of phase fluctuations. A model is developed and analytical predictions obtained for these quantities using geometrical acoustics are shown to be in agreement with experimental observations.
© 2022 EPLA
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