Transducer-Plane Streaming Patterns in Thin-Layer Acoustofluidic Devices

Transducer-Plane Streaming Patterns in Thin-Layer Acoustofluidic Devices While classical Rayleigh streaming, whose circulations are perpendicular to the transducer radiating surfaces, is well known, transducer-plane streaming patterns, in which vortices circulate parallel to the surface driving the streaming, have been less widely discussed. Previously, a four-quadrant transducer-plane streaming pattern has been seen experimentally and subsequently investigated through numerical modeling. In this paper, we show that by considering higher-order three-dimensional cavity modes of rectangular channels in thin-layer acoustofluidic manipulation devices, a wider family of transducer-plane streaming patterns are found. As an example, we present a transducer-plane streaming pattern, which consists of eight streaming vortices with each occupying one octant of the plane parallel to the transducer radiating surfaces, which we call here eight-octant transducer-plane streaming. An idealized modal model is also presented to highlight and explore the conditions required to produce rotational patterns. We find that both standing and traveling wave components are typically necessary for the formation of transducer-plane streaming patterns. In addition, other streaming patterns related to acoustic vortices and systems in which traveling waves dominate are explored with implications for potential applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Applied American Physical Society (APS)

Transducer-Plane Streaming Patterns in Thin-Layer Acoustofluidic Devices

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Transducer-Plane Streaming Patterns in Thin-Layer Acoustofluidic Devices

Abstract

While classical Rayleigh streaming, whose circulations are perpendicular to the transducer radiating surfaces, is well known, transducer-plane streaming patterns, in which vortices circulate parallel to the surface driving the streaming, have been less widely discussed. Previously, a four-quadrant transducer-plane streaming pattern has been seen experimentally and subsequently investigated through numerical modeling. In this paper, we show that by considering higher-order three-dimensional cavity modes of rectangular channels in thin-layer acoustofluidic manipulation devices, a wider family of transducer-plane streaming patterns are found. As an example, we present a transducer-plane streaming pattern, which consists of eight streaming vortices with each occupying one octant of the plane parallel to the transducer radiating surfaces, which we call here eight-octant transducer-plane streaming. An idealized modal model is also presented to highlight and explore the conditions required to produce rotational patterns. We find that both standing and traveling wave components are typically necessary for the formation of transducer-plane streaming patterns. In addition, other streaming patterns related to acoustic vortices and systems in which traveling waves dominate are explored with implications for potential applications.
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Publisher
American Physical Society (APS)
Copyright
Copyright © © 2017 American Physical Society
eISSN
2331-7019
D.O.I.
10.1103/PhysRevApplied.8.014018
Publisher site
See Article on Publisher Site

Abstract

While classical Rayleigh streaming, whose circulations are perpendicular to the transducer radiating surfaces, is well known, transducer-plane streaming patterns, in which vortices circulate parallel to the surface driving the streaming, have been less widely discussed. Previously, a four-quadrant transducer-plane streaming pattern has been seen experimentally and subsequently investigated through numerical modeling. In this paper, we show that by considering higher-order three-dimensional cavity modes of rectangular channels in thin-layer acoustofluidic manipulation devices, a wider family of transducer-plane streaming patterns are found. As an example, we present a transducer-plane streaming pattern, which consists of eight streaming vortices with each occupying one octant of the plane parallel to the transducer radiating surfaces, which we call here eight-octant transducer-plane streaming. An idealized modal model is also presented to highlight and explore the conditions required to produce rotational patterns. We find that both standing and traveling wave components are typically necessary for the formation of transducer-plane streaming patterns. In addition, other streaming patterns related to acoustic vortices and systems in which traveling waves dominate are explored with implications for potential applications.

Journal

Physical Review AppliedAmerican Physical Society (APS)

Published: Jul 1, 2017

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