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Modal Rayleigh-like streaming in layered acoustofluidic devices

Modal Rayleigh-like streaming in layered acoustofluidic devices
Modal Rayleigh-like streaming in layered acoustofluidic devices
Classical Rayleigh streaming is well known and can be modelled using Nyborg’s limiting velocity method as driven by fluid velocities adjacent to the walls parallel to the axis of the main acoustic resonance. We have demonstrated previously the existence and the mechanism of four-quadrant transducer plane streaming patterns in thin-layered acoustofluidic devices which are driven by the limiting velocities on the walls perpendicular to the axis of the main acoustic propagation. We have recently found experimentally that there is a third case which resembles Rayleigh streaming but is a more complex pattern related to three-dimensional cavity modes of an enclosure. This streaming has vortex sizes related to the effective wavelength in each cavity axis of the modes which can be much larger than those found in the one-dimensional case with Rayleigh streaming. We will call this here modal Rayleigh-like streaming and show that it can be important in layered acoustofluidic manipulation devices. This paper seeks to establish the conditions under which each of these is dominant and shows how the limiting velocity field for each relates to different parts of the complex acoustic intensity patterns at the driving boundaries.
1070-6631
1-13
Lei, Junjun
7b48b212-a721-4eca-b866-ff4fdad219e2
Glynne-Jones, Peter
6ca3fcbc-14db-4af9-83e2-cf7c8b91ef0d
Hill, Martyn
0cda65c8-a70f-476f-b126-d2c4460a253e
Lei, Junjun
7b48b212-a721-4eca-b866-ff4fdad219e2
Glynne-Jones, Peter
6ca3fcbc-14db-4af9-83e2-cf7c8b91ef0d
Hill, Martyn
0cda65c8-a70f-476f-b126-d2c4460a253e

Lei, Junjun, Glynne-Jones, Peter and Hill, Martyn (2016) Modal Rayleigh-like streaming in layered acoustofluidic devices. Physics of Fluids, 28 (1), 1-13. (doi:10.1063/1.4939590).

Record type: Article

Abstract

Classical Rayleigh streaming is well known and can be modelled using Nyborg’s limiting velocity method as driven by fluid velocities adjacent to the walls parallel to the axis of the main acoustic resonance. We have demonstrated previously the existence and the mechanism of four-quadrant transducer plane streaming patterns in thin-layered acoustofluidic devices which are driven by the limiting velocities on the walls perpendicular to the axis of the main acoustic propagation. We have recently found experimentally that there is a third case which resembles Rayleigh streaming but is a more complex pattern related to three-dimensional cavity modes of an enclosure. This streaming has vortex sizes related to the effective wavelength in each cavity axis of the modes which can be much larger than those found in the one-dimensional case with Rayleigh streaming. We will call this here modal Rayleigh-like streaming and show that it can be important in layered acoustofluidic manipulation devices. This paper seeks to establish the conditions under which each of these is dominant and shows how the limiting velocity field for each relates to different parts of the complex acoustic intensity patterns at the driving boundaries.

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Accepted/In Press date: 9 December 2015
e-pub ahead of print date: 12 January 2016
Published date: January 2016
Organisations: Mechatronics

Identifiers

Local EPrints ID: 386061
URI: http://eprints.soton.ac.uk/id/eprint/386061
ISSN: 1070-6631
PURE UUID: 109eccff-ebc2-40d4-ac85-c668e38f20f5
ORCID for Peter Glynne-Jones: ORCID iD orcid.org/0000-0001-5684-3953
ORCID for Martyn Hill: ORCID iD orcid.org/0000-0001-6448-9448

Catalogue record

Date deposited: 28 Jan 2016 09:17
Last modified: 18 Feb 2021 16:54

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