Transition from Boundary-Driven to Bulk-Driven Acoustic Streaming Due to Nonlinear Thermoviscous Effects at High Acoustic Energy Densities
Joergensen, Jonas ; Qiu, Wei LU
and Bruus, Henrik
(2023)
In Physical Review Letters
130(4).
- Abstract
- Acoustic streaming at high acoustic energy densities Eac is studied in a microfluidic channel. It is demonstrated theoretically, numerically, and experimentally with good agreement that frictional heating can alter the streaming pattern qualitatively at high Eac above 400 J/m^3. The study shows how as a function of increasing Eac at fixed frequency, the traditional boundary-driven four streaming rolls created at a halfwave standing-wave resonance transition into two large streaming rolls. This nonlinear transition occurs because friction heats up the fluid resulting in a temperature gradient, which spawns an acoustic body force in the bulk that drives thermoacoustic streaming.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/15bbf9e8-6ff2-435e-8a73-be20ffc0f58e
- author
- Joergensen, Jonas
; Qiu, Wei
LU
and Bruus, Henrik
- organization
- publishing date
- 2023-01-24
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 130
- issue
- 4
- article number
- 044001
- pages
- 6 pages
- publisher
- American Physical Society
- external identifiers
-
- scopus:85147191975
- pmid:36763435
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.130.044001
- language
- English
- LU publication?
- yes
- id
- 15bbf9e8-6ff2-435e-8a73-be20ffc0f58e
- date added to LUP
- 2023-01-24 20:02:03
- date last changed
- 2023-11-07 10:14:35
@article{15bbf9e8-6ff2-435e-8a73-be20ffc0f58e,
abstract = {{Acoustic streaming at high acoustic energy densities Eac is studied in a microfluidic channel. It is demonstrated theoretically, numerically, and experimentally with good agreement that frictional heating can alter the streaming pattern qualitatively at high Eac above 400 J/m^3. The study shows how as a function of increasing Eac at fixed frequency, the traditional boundary-driven four streaming rolls created at a halfwave standing-wave resonance transition into two large streaming rolls. This nonlinear transition occurs because friction heats up the fluid resulting in a temperature gradient, which spawns an acoustic body force in the bulk that drives thermoacoustic streaming.}},
author = {{Joergensen, Jonas and Qiu, Wei and Bruus, Henrik}},
issn = {{1079-7114}},
language = {{eng}},
month = {{01}},
number = {{4}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Transition from Boundary-Driven to Bulk-Driven Acoustic Streaming Due to Nonlinear Thermoviscous Effects at High Acoustic Energy Densities}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.130.044001}},
doi = {{10.1103/PhysRevLett.130.044001}},
volume = {{130}},
year = {{2023}},
}