Phenomenology of laminar acoustic streaming jets

Bjarne Vincent; Daniel  Henry; Abhishek Kumar; Valery Botton; Alban Potherat; Sophie Miralles

doi:10.1103/ylrm-gsxl

Phenomenology of laminar acoustic streaming jets

Bjarne Vincent
, Daniel Henry
, Abhishek Kumar
, Valery Botton
, Alban Potherat
, Sophie Miralles

Research Centre for Fluid and Complex Systems

Ecole Centrale de Lyon
Institut national des sciences appliquées de Lyon
Université Claude Bernard Lyon 1

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

29 Downloads (Pure)

Abstract

This work identifies the physical mechanisms at play in the different flow regions along an Eckart acoustic streaming jet by means of numerical simulation based on a modeling of the driving acoustic force including attenuation effects. The flow is forced by an axisymmetric beam of progressive sound waves attenuating over a significant part of a closed cylindrical vessel where the jet is confined. We focus on the steady, axisymmetric, and laminar regime. The jet typically displays a strong acceleration close to the source before reaching a peak velocity. At further distances from the transducer, the on-axis jet velocity smoothly decays before reaching the opposite wall. For each of these flow regions along the jet, we derive scaling laws for the on-axis velocity with the magnitude of the acoustic force and the diffraction of the driving acoustic beam. These laws highlight the different flow regimes along the jet and establish a clear picture of its spatial structure, able to inform the design of experimental or industrial setups involving Eckart streaming jets.

Original language	English
Article number	114103
Number of pages	25
Journal	Physical Review Fluids
Volume	10
Issue number	11
DOIs	https://doi.org/10.1103/ylrm-gsxl
Publication status	Published - 25 Nov 2025

Bibliographical note

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI - CC BY

Funding

This work was carried out as part of the BRASSOA project supported by the Institut Carnot Ingénierie@Lyon and by a Royal Society International Exchange grant (Grant No. IESR2202212). The support from the PMCS2I of Ecole Centrale de Lyon for the numerical calculations is gratefully acknowledged. We would particularly like to thank both Laurent Pouilloux (Ecole Centrale de Lyon) and Alex Pedcenko (Coventry University) for their availability and for providing help at any stage of this project. We also would like to thank Hugh M. Blackburn for helping with the use of the spectral element code Semtex.

Funders	Funder number
institut Carnot Ingénierie@Lyon
Ecole Centrale de Lyon
The Royal Society	IESR2202212

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Cite this

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AU - Miralles, Sophie

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N2 - This work identifies the physical mechanisms at play in the different flow regions along an Eckart acoustic streaming jet by means of numerical simulation based on a modeling of the driving acoustic force including attenuation effects. The flow is forced by an axisymmetric beam of progressive sound waves attenuating over a significant part of a closed cylindrical vessel where the jet is confined. We focus on the steady, axisymmetric, and laminar regime. The jet typically displays a strong acceleration close to the source before reaching a peak velocity. At further distances from the transducer, the on-axis jet velocity smoothly decays before reaching the opposite wall. For each of these flow regions along the jet, we derive scaling laws for the on-axis velocity with the magnitude of the acoustic force and the diffraction of the driving acoustic beam. These laws highlight the different flow regimes along the jet and establish a clear picture of its spatial structure, able to inform the design of experimental or industrial setups involving Eckart streaming jets.

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Phenomenology of laminar acoustic streaming jets

Abstract

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