Selective seeding for micro-PIV

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...

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Bibliographic Details
Published in:Experiments in fluids 2006-08, Vol.41 (2), p.155-159
Main Authors: Mielnik, Michal, Saetran, Lars
Format: Article
Language:English
Subjects:
Analogies
Fluid dynamics
Fluid flow
Fluids
Lasers
Nucleation
Position measurement
Thin films
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Summary: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.
ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-005-0103-8