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Thermoacoustic streaming in a linear temperature gradient

Corato, Enrico LU orcid ; van Assche, David LU ; Jakobsson, Ola LU ; Qiu, Wei LU orcid and Augustsson, Per LU (2025) In Physical Review E 112(2).
Abstract
Thermoacoustic effects arise when a temperature gradient is present in a sound field. This work investigates the interplay of orthogonal sound and thermal fields in a water-filled microchannel. We measured the three-dimensional streaming in the water-filled cavity for only sound applied, for only thermal gradient, and for the two fields combined. The resulting thermoacoustic streaming was 30 times faster than natural convection and 15 times faster than acoustic streaming. We also performed two-dimensional simulations of the channel's cross section, reaching good qualitative agreement with the measured streaming data. Moreover, we measured the temperature of the fluid both with and without a sound field, showing that the thermal resistance... (More)
Thermoacoustic effects arise when a temperature gradient is present in a sound field. This work investigates the interplay of orthogonal sound and thermal fields in a water-filled microchannel. We measured the three-dimensional streaming in the water-filled cavity for only sound applied, for only thermal gradient, and for the two fields combined. The resulting thermoacoustic streaming was 30 times faster than natural convection and 15 times faster than acoustic streaming. We also performed two-dimensional simulations of the channel's cross section, reaching good qualitative agreement with the measured streaming data. Moreover, we measured the temperature of the fluid both with and without a sound field, showing that the thermal resistance of the channel decreased when the acoustic field was present, while we could not capture this in the current model. We believe our results can have implications for acoustically aided heat exchangers with liquid media. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review E
volume
112
issue
2
article number
025102
pages
10 pages
publisher
American Physical Society
ISSN
2470-0045
DOI
10.1103/rn1j-19q5
language
English
LU publication?
yes
id
ef4a6a63-6de9-45b8-9a44-c3703057388e
date added to LUP
2025-08-06 09:43:52
date last changed
2025-08-11 13:13:34
@article{ef4a6a63-6de9-45b8-9a44-c3703057388e,
  abstract     = {{Thermoacoustic effects arise when a temperature gradient is present in a sound field. This work investigates the interplay of orthogonal sound and thermal fields in a water-filled microchannel. We measured the three-dimensional streaming in the water-filled cavity for only sound applied, for only thermal gradient, and for the two fields combined. The resulting thermoacoustic streaming was 30 times faster than natural convection and 15 times faster than acoustic streaming. We also performed two-dimensional simulations of the channel's cross section, reaching good qualitative agreement with the measured streaming data. Moreover, we measured the temperature of the fluid both with and without a sound field, showing that the thermal resistance of the channel decreased when the acoustic field was present, while we could not capture this in the current model. We believe our results can have implications for acoustically aided heat exchangers with liquid media.}},
  author       = {{Corato, Enrico and van Assche, David and Jakobsson, Ola and Qiu, Wei and Augustsson, Per}},
  issn         = {{2470-0045}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review E}},
  title        = {{Thermoacoustic streaming in a linear temperature gradient}},
  url          = {{http://dx.doi.org/10.1103/rn1j-19q5}},
  doi          = {{10.1103/rn1j-19q5}},
  volume       = {{112}},
  year         = {{2025}},
}