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Acoustic particle trapping driven by axial primary radiation force in shaped traps

Malik, L. ; Nath, A. ; Nandy, S. ; Laurell, T. LU and Sen, A. K. (2022) In Physical Review E 105(3).
Abstract

We study particle trapping driven by the axial primary radiation force (A-PRF) in shaped traps exposed to standing bulk acoustic waves (S-BAW) using numerical simulations and experiments. The utilization of the stronger A-PRF as the main retention force is a consequence of standing-wave formation along the flow direction, instead of the orthogonal direction as in the case of traditionally used lateral-PRF S-BAW trapping setups. The study of particle dynamics reveals that the competition between A-PRF and viscous drag force governs particle trajectory. The ratio of the acoustic energy to the viscous work (β) provides a general criterion for particle trapping at a distinctive off-node site that is spatially controllable. Particles get... (More)

We study particle trapping driven by the axial primary radiation force (A-PRF) in shaped traps exposed to standing bulk acoustic waves (S-BAW) using numerical simulations and experiments. The utilization of the stronger A-PRF as the main retention force is a consequence of standing-wave formation along the flow direction, instead of the orthogonal direction as in the case of traditionally used lateral-PRF S-BAW trapping setups. The study of particle dynamics reveals that the competition between A-PRF and viscous drag force governs particle trajectory. The ratio of the acoustic energy to the viscous work (β) provides a general criterion for particle trapping at a distinctive off-node site that is spatially controllable. Particles get trapped for β≥βcr at some distance away from the nodal plane and the distance varies as β-c (c=0.6-1.0). The use of A-PRF as the retention force could potentially allow traditional S-BAW trapping systems to envisage high-throughput advancements surpassing the current standards in cell-handling unit operations.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review E
volume
105
issue
3
article number
035103
pages
15 pages
publisher
American Physical Society
external identifiers
  • pmid:35428152
  • scopus:85126700200
ISSN
2470-0045
DOI
10.1103/PhysRevE.105.035103
language
English
LU publication?
yes
id
dac3b039-55d5-42e5-b29e-dbd5e06ceff1
date added to LUP
2022-05-20 15:33:05
date last changed
2024-04-18 09:18:52
@article{dac3b039-55d5-42e5-b29e-dbd5e06ceff1,
  abstract     = {{<p>We study particle trapping driven by the axial primary radiation force (A-PRF) in shaped traps exposed to standing bulk acoustic waves (S-BAW) using numerical simulations and experiments. The utilization of the stronger A-PRF as the main retention force is a consequence of standing-wave formation along the flow direction, instead of the orthogonal direction as in the case of traditionally used lateral-PRF S-BAW trapping setups. The study of particle dynamics reveals that the competition between A-PRF and viscous drag force governs particle trajectory. The ratio of the acoustic energy to the viscous work (β) provides a general criterion for particle trapping at a distinctive off-node site that is spatially controllable. Particles get trapped for β≥βcr at some distance away from the nodal plane and the distance varies as β-c (c=0.6-1.0). The use of A-PRF as the retention force could potentially allow traditional S-BAW trapping systems to envisage high-throughput advancements surpassing the current standards in cell-handling unit operations. </p>}},
  author       = {{Malik, L. and Nath, A. and Nandy, S. and Laurell, T. and Sen, A. K.}},
  issn         = {{2470-0045}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review E}},
  title        = {{Acoustic particle trapping driven by axial primary radiation force in shaped traps}},
  url          = {{http://dx.doi.org/10.1103/PhysRevE.105.035103}},
  doi          = {{10.1103/PhysRevE.105.035103}},
  volume       = {{105}},
  year         = {{2022}},
}