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Accelerated Particle Separation in a DLD Device at Re > 1 Investigated by Means of µPIV

Kottmeier, Jonathan ; Wullenweber, Maike ; Blahout, Sebastian ; Hussong, Jeanette ; Kampen, Ingo ; Kwade, Arno ; Dietzel, Andreas (2022)
Accelerated Particle Separation in a DLD Device at Re > 1 Investigated by Means of µPIV.
In: Micromachines, 2022, 10 (11)
doi: 10.26083/tuprints-00015744
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Accelerated Particle Separation in a DLD Device at Re > 1 Investigated by Means of µPIV
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Micromachines
Volume of the journal: 10
Issue Number: 11
Collation: 18 Seiten
DOI: 10.26083/tuprints-00015744
Corresponding Links:
Origin: Secondary publication DeepGreen

A pressure resistant and optically accessible deterministic lateral displacement (DLD) device was designed and microfabricated from silicon and glass for high-throughput fractionation of particles between 3.0 and 7.0 µm comprising array segments of varying tilt angles with a post size of 5 µm. The design was supported by computational fluid dynamic (CFD) simulations using OpenFOAM software. Simulations indicated a change in the critical particle diameter for fractionation at higher Reynolds numbers. This was experimentally confirmed by microparticle image velocimetry (µPIV) in the DLD device with tracer particles of 0.86 µm. At Reynolds numbers above 8 an asymmetric flow field pattern between posts could be observed. Furthermore, the new DLD device allowed successful fractionation of 2 µm and 5 µm fluorescent polystyrene particles at Re = 0.5–25.

Uncontrolled Keywords: microfluidics, deterministic lateral displacement, Reynolds number, particle image velocimetry, size-dependent fractionation
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-157446
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
Date Deposited: 09 Feb 2022 15:31
Last Modified: 07 Mar 2023 07:26
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/15744
PPN: 505551586
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