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Acoustic radiation- and streaming-induced microparticle velocities determined by microparticle image velocimetry in an ultrasound symmetry plane

Barnkob, Rune; Augustsson, Per LU ; Laurell, Thomas LU and Bruus, Henrik (2012) In Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)2001-01-01+01:002016-01-01+01:00 86(5).
Abstract
We present microparticle image velocimetry measurements of suspended microparticles of diameters from 0.6 to 10 mu m undergoing acoustophoresis in an ultrasound symmetry plane in a microchannel. The motion of the smallest particles is dominated by the Stokes drag from the induced acoustic streaming flow, while the motion of the largest particles is dominated by the acoustic radiation force. For all particle sizes we predict theoretically how much of the particle velocity is due to radiation and streaming, respectively. These predictions include corrections for particle-wall interactions and ultrasonic thermoviscous effects and match our measurements within the experimental uncertainty. Finally, we predict theoretically and confirm... (More)
We present microparticle image velocimetry measurements of suspended microparticles of diameters from 0.6 to 10 mu m undergoing acoustophoresis in an ultrasound symmetry plane in a microchannel. The motion of the smallest particles is dominated by the Stokes drag from the induced acoustic streaming flow, while the motion of the largest particles is dominated by the acoustic radiation force. For all particle sizes we predict theoretically how much of the particle velocity is due to radiation and streaming, respectively. These predictions include corrections for particle-wall interactions and ultrasonic thermoviscous effects and match our measurements within the experimental uncertainty. Finally, we predict theoretically and confirm experimentally that the ratio between the acoustic radiation-and streaming-induced particle velocities is proportional to the actuation frequency, the acoustic contrast factor, and the square of the particle size, while it is inversely proportional to the kinematic viscosity. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)2001-01-01+01:002016-01-01+01:00
volume
86
issue
5
publisher
American Physical Society
external identifiers
  • wos:000311144000004
  • scopus:84870443058
ISSN
1539-3755
DOI
10.1103/PhysRevE.86.056307
language
English
LU publication?
yes
id
e42288f3-e94b-41fc-9d5a-f75490156f2e (old id 3243981)
date added to LUP
2012-12-28 10:10:19
date last changed
2017-10-08 03:21:59
@article{e42288f3-e94b-41fc-9d5a-f75490156f2e,
  abstract     = {We present microparticle image velocimetry measurements of suspended microparticles of diameters from 0.6 to 10 mu m undergoing acoustophoresis in an ultrasound symmetry plane in a microchannel. The motion of the smallest particles is dominated by the Stokes drag from the induced acoustic streaming flow, while the motion of the largest particles is dominated by the acoustic radiation force. For all particle sizes we predict theoretically how much of the particle velocity is due to radiation and streaming, respectively. These predictions include corrections for particle-wall interactions and ultrasonic thermoviscous effects and match our measurements within the experimental uncertainty. Finally, we predict theoretically and confirm experimentally that the ratio between the acoustic radiation-and streaming-induced particle velocities is proportional to the actuation frequency, the acoustic contrast factor, and the square of the particle size, while it is inversely proportional to the kinematic viscosity.},
  articleno    = {056307},
  author       = {Barnkob, Rune and Augustsson, Per and Laurell, Thomas and Bruus, Henrik},
  issn         = {1539-3755},
  language     = {eng},
  number       = {5},
  publisher    = {American Physical Society},
  series       = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)2001-01-01+01:002016-01-01+01:00},
  title        = {Acoustic radiation- and streaming-induced microparticle velocities determined by microparticle image velocimetry in an ultrasound symmetry plane},
  url          = {http://dx.doi.org/10.1103/PhysRevE.86.056307},
  volume       = {86},
  year         = {2012},
}