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Erschienen in: Experiments in Fluids 2/2006

01.08.2006 | Research Article

Selective seeding for micro-PIV

verfasst von: Michal M. Mielnik, Lars R. Saetran

Erschienen in: Experiments in Fluids | Ausgabe 2/2006

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Abstract

A novel seeding method for microscale particle image velocimetry (micro-PIV) is presented. The method relies on selective seeding of a thin fluid layer within an otherwise particle-free flow. In analogy to the laser sheet in macroscale PIV, the generated particle sheet defines both the depth and the position of the measurement plane, independent of the details of the optical setup. Selectively seeded micro-PIV is applied to measure the instantaneous velocity field in a microchannel with a depth-wise resolution 20% below the estimated optical measurement depth of the micro-PIV system. In principle, a measurement depth corresponding to the diameter of the tracer particles may be achieved.

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Fußnoten
1
Instantaneous velocity fields in a shallow channel (∼25 μm) have been reported by Shinohara et al. (2004). In this case, the seeding load could be sufficiently increased to permit well-resolved single image-pair interrogation.
 
2
Particle sheet generation may also, in principle, be accomplished by dielectrophoresis, as demonstrated computationally in a recent work by Leu et al. (2005).
 
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Metadaten
Titel
Selective seeding for micro-PIV
verfasst von
Michal M. Mielnik
Lars R. Saetran
Publikationsdatum
01.08.2006
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 2/2006
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-005-0103-8

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