Microfluidic waves
Microfluidic waves
The propagation of pressure waves in fluidic channels with elastic covers is discussed in view of applications to flow control in microfluidic devices. A theory is presented which describes pressure waves in the fluid that are coupled to bending waves in the elastic cover. At low frequencies, the lateral bending of the cover dominates over longitudinal bending, leading to propagating, non-dispersive longitudinal pressure waves in the channel. The theory addresses effects due to both the finite viscosity and compressibility of the fluid. The coupled waves propagate without dispersion, as long as the wave length is larger than the channel width. It is shown that in channels of typical microfluidic dimensions, wave velocities in the range of a few 10 m s?1 result if the channels are covered by films of a compliant material such as PDMS. The application of this principle to design microfluidic band pass filters based on standing waves is discussed. Characteristic frequencies in the range of a few kHz are readily achieved with quality factors above 30.
waves, fluid, microfluidic devices, microfluidic waves, fluidic channels
3846-3854
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Begley, Matthew R.
9f4e52bc-507a-4ef6-910f-bd11d25c2209
Haj-Hariri, Hossein
9f8f9523-a915-43f3-b935-a849d0428ec8
30 September 2011
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Begley, Matthew R.
9f4e52bc-507a-4ef6-910f-bd11d25c2209
Haj-Hariri, Hossein
9f8f9523-a915-43f3-b935-a849d0428ec8
Utz, Marcel, Begley, Matthew R. and Haj-Hariri, Hossein
(2011)
Microfluidic waves.
Lab on a Chip, 11 (22), Autumn Issue, .
(doi:10.1039/C0LC00426J).
Abstract
The propagation of pressure waves in fluidic channels with elastic covers is discussed in view of applications to flow control in microfluidic devices. A theory is presented which describes pressure waves in the fluid that are coupled to bending waves in the elastic cover. At low frequencies, the lateral bending of the cover dominates over longitudinal bending, leading to propagating, non-dispersive longitudinal pressure waves in the channel. The theory addresses effects due to both the finite viscosity and compressibility of the fluid. The coupled waves propagate without dispersion, as long as the wave length is larger than the channel width. It is shown that in channels of typical microfluidic dimensions, wave velocities in the range of a few 10 m s?1 result if the channels are covered by films of a compliant material such as PDMS. The application of this principle to design microfluidic band pass filters based on standing waves is discussed. Characteristic frequencies in the range of a few kHz are readily achieved with quality factors above 30.
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Published date: 30 September 2011
Keywords:
waves, fluid, microfluidic devices, microfluidic waves, fluidic channels
Organisations:
Magnetic Resonance
Identifiers
Local EPrints ID: 354138
URI: http://eprints.soton.ac.uk/id/eprint/354138
ISSN: 1473-0197
PURE UUID: afefffc9-2c76-42e8-a0e4-1ab462524b61
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Date deposited: 03 Jul 2013 09:58
Last modified: 15 Mar 2024 03:44
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Contributors
Author:
Matthew R. Begley
Author:
Hossein Haj-Hariri
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