The design and modeling of a lateral acoustic particle manipulator exhibiting quarter-wave operation
Glynne-Jones, Peter, Hill, Martyn, Harris, Nicholas R., Townsend, Rosemary J. and Ravula, Surendra K. (2008) The design and modeling of a lateral acoustic particle manipulator exhibiting quarter-wave operation. Journal of the Acoustical Society of America, 123, (5), p.3841. (doi:10.1121/1.2935644).
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Prior work [Petersson et al., 2004] has demonstrated the operation of a half-wave acoustic particle manipulator, whose forces act in the plane of a silicon substrate. In a half-wave device particles are directed to the centre of a channel. Devices acting in plane have manufacturing advantages, and lend themselves to many microfluidic applications. We demonstrate, for the first time, such a device with a quarter-wave mode that is able to manipulate particles to the side of a channel in addition to a near half wave mode. The design utilises resonant “islands” to create the necessary pressure release boundary condition. The device is conventionally milled in brass, permitting cheaper and quicker fabrication than in silicon. Finite element modelling is presented to elucidate the operation of both half and quarter-wave devices. In contrast to essentially one-dimensional planar devices, the two-dimensional distribution of the velocity and pressure fields result in particles being constrained to a line within the channel.
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
|Divisions:||University Structure - Pre August 2011 > School of Electronics and Computer Science
University Structure - Pre August 2011 > School of Education
University Structure - Pre August 2011 > School of Engineering Sciences > Electro-Mechanical Engineering
|Date Deposited:||10 Nov 2008|
|Last Modified:||27 Mar 2014 18:45|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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