Combination of electric and acoustic actuation removes bubbles from liquid without buoyancy

Scilight ◽  
2021 ◽  
Vol 2021 (35) ◽  
pp. 351104
Author(s):  
Adam Liebendorfer
Keyword(s):  
Acoustic Actuation

Microfluidic chamber with acoustic actuation by LiNbO 3 interdigital transducers for tumor cell investigations

2007 ◽  
Author(s):  
Matthias Gruber ◽  
Richard Heming ◽  
Eva-Maria Schnaeker ◽  
Thomas Seiler
Keyword(s):  
Tumor Cell ◽  
Microfluidic Chamber ◽  
Acoustic Actuation

scholarly journals Bubble removal by electric and acoustic actuation for heat transfer enhancement

AIP Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 085030
Author(s):  
Youngbin Hyun ◽  
Kang Yong Lee ◽  
Deasung Jang ◽  
Sang Kug Chung
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Transfer Enhancement ◽  
Acoustic Actuation ◽  
Bubble Removal

scholarly journals Acoustic actuation ofin situfabricated artificial cilia

2018 ◽  
Vol 28 (2) ◽  
pp. 025012 ◽  
Author(s):  
Sinem Orbay ◽  
Adem Ozcelik ◽  
Hunter Bachman ◽  
Tony Jun Huang
Keyword(s):  
Artificial Cilia ◽  
Acoustic Actuation

Microfluidic Flow Control and Particle Transport Using Acoustically Actuated Bubbles in Teardrop Shaped Cavities

2012 ◽  
Author(s):  
Ali Hashmi ◽  
Garrett Heiman ◽  
Gan Yu ◽  
Hyuck-Jin Kwon ◽  
Jie Xu
Keyword(s):  
Flow Field ◽  
Flow Control ◽  
Flow Direction ◽  
Complex Flow ◽  
Actuation Frequency ◽  
Microfluidic Flow ◽  
Flow Speeds ◽  
Acoustic Actuation ◽  
Induced Flow ◽  
A Chain

It is well known that a symmetric microstreaming flow field will present in the vicinity of an acoustically actuated bubble. In this study, we demonstrate that oscillating microbubbles confined in teardrop-shaped cavities can result in a break in the symmetry of a microstreaming flow field. The teardrop cavity controls the size and shape of the bubble, regulating the volume and therefore its resonance frequency. If actuated in an acoustic field, the induced flow field can then be turned on and off by changing the acoustic actuation frequency. By harnessing the flow field directing capabilities of symmetry breaks and the switching properties of selective excitation of microbubbles, we generate and characterize a microfluidic switch for directing flow direction. We also show that a chain of multiple teardrop-shaped cavities can be used as a transport mechanism for directing particles spatially at high flow speeds. Our results demonstrate that teardrop cavities have great potential in future lab-on-a-chip devices by providing simple solutions to complex flow circuits for temporal and spatial flow control.

scholarly journals Characterization and Modelling of Circular Piezoelectric Micro Speakers for Audio Acoustic Actuation

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
J. Mendoza-López ◽  
S. Sánchez-Solano ◽  
J. L. Huertas-Díaz
Keyword(s):  
Hearing Aids ◽  
Piezoelectric Layer ◽  
Ultrasonic Transducer ◽  
Audio Frequency ◽  
Frequency Range ◽  
Acoustic Frequency ◽  
Medical Diagnostic ◽  
Acoustic Actuation ◽  
Audio Frequency Range

A study of circular piezoelectric micro speakers is presented for applications in the audio frequency range, including values for impedance, admittance, noise figures, transducer gain, and acoustic frequency responses. The micro speakers were modelled based on piezoelectric micro ultrasonic transducer (pMUT) design techniques and principles. In order to reach the audio frequency range, transducer radii were increased to the order of one centimetre, whilst piezoelectric layer thicknesses ranged the order of several μm. The micro actuators presented might be used for a variety of electroacoustic applications including noise control, hearing aids, earphones, sonar, and medical diagnostic ultrasound. This work main contribution is the characterization of the design space and transducer performance as a function of transducer radius, piezoelectric layer thickness, and frequency range, looking towards an optimized fabrication process.

scholarly journals Micro/nano acoustofluidics: materials, phenomena, design, devices, and applications

Lab on a Chip ◽  
2018 ◽  
Vol 18 (14) ◽  
pp. 1952-1996 ◽  
Author(s):  
William Connacher ◽  
Naiqing Zhang ◽  
An Huang ◽  
Jiyang Mei ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Lab On A Chip ◽  
Particle Manipulation ◽  
Small Scales ◽  
Acoustic Actuation ◽  
On Chip

Acoustic actuation of fluids at small scales may finally enable a comprehensive lab-on-a-chip revolution in microfluidics, overcoming long-standing difficulties in fluid and particle manipulation on-chip.

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