Blahout, Sebastian ; Reinecke, Simon R. ; Tabaei Kazerooni, Hamid ; Kruggel-Emden, Harald ; Hussong, Jeanette (2024)
On the 3D distribution and size fractionation of microparticles in a serpentine microchannel.
In: Microfluidics and Nanofluidics, 2020, 24 (3)
doi: 10.26083/tuprints-00023926
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Suitable methods to realize a multi-dimensional fractionation of microparticles smaller than 10μm diameter are still rare. In the present study, size and density fractionation is investigated for 3.55 μm and 9.87 μm particles in a sharp-corner serpentine microchannel of cross-sectional aspect ratio h/w=0.25. Experimental results are obtained through Astigmatism Particle Tracking Velocimetry (APTV) measurements, from which three-dimensional particle distributions are reconstructed for Reynolds numbers between 100 and 150. The 3D reconstruction shows for the first time that equilibrium trajectories do not only develop over the channel width, i.e. in-plane equilibrium positions but also over the channel height at different out-of-plane positions. With increasing Reynolds number, 9.87μm polystyrene ρPS=1.05 g cm⁻³ and melamine ρMF=1.51 g cm⁻³ particles focus on two trajectories near the channel bisector. In contrast to this, it is shown that 3.55 μm polystyrene particles develop four equilibrium trajectories at different in-plane and out-of-plane positions up to a critical Reynolds number. Beyond this critical Reynolds number, also these particles merge to two trajectories at different channel heights. While the rearrangement of 3.55 μm polystyrene particles just starts beyond Re>140, 9.87 μm polystyrene particles undergo this rearrangement already at Re=100. As the equilibrium trajectories of these two particle groups are located at similar out-of-plane positions, outlet geometries that aim to separate particles along the channel width turn out to be a good choice for size fractionation. Indeed, polystyrene particles of different size assume laterally well-separated equilibrium trajectories such that a size fractionation of nearly 100% at Re=110 can be achieved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Blahout, Sebastian ; Reinecke, Simon R. ; Tabaei Kazerooni, Hamid ; Kruggel-Emden, Harald ; Hussong, Jeanette |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | On the 3D distribution and size fractionation of microparticles in a serpentine microchannel |
| Sprache: | Englisch |
| Publikationsjahr: | 30 April 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | März 2020 |
| Ort der Erstveröffentlichung: | Berlin ; Heidelberg |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Microfluidics and Nanofluidics |
| Jahrgang/Volume einer Zeitschrift: | 24 |
| (Heft-)Nummer: | 3 |
| Kollation: | 10 Seiten |
| DOI: | 10.26083/tuprints-00023926 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23926 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Suitable methods to realize a multi-dimensional fractionation of microparticles smaller than 10μm diameter are still rare. In the present study, size and density fractionation is investigated for 3.55 μm and 9.87 μm particles in a sharp-corner serpentine microchannel of cross-sectional aspect ratio h/w=0.25. Experimental results are obtained through Astigmatism Particle Tracking Velocimetry (APTV) measurements, from which three-dimensional particle distributions are reconstructed for Reynolds numbers between 100 and 150. The 3D reconstruction shows for the first time that equilibrium trajectories do not only develop over the channel width, i.e. in-plane equilibrium positions but also over the channel height at different out-of-plane positions. With increasing Reynolds number, 9.87μm polystyrene ρPS=1.05 g cm⁻³ and melamine ρMF=1.51 g cm⁻³ particles focus on two trajectories near the channel bisector. In contrast to this, it is shown that 3.55 μm polystyrene particles develop four equilibrium trajectories at different in-plane and out-of-plane positions up to a critical Reynolds number. Beyond this critical Reynolds number, also these particles merge to two trajectories at different channel heights. While the rearrangement of 3.55 μm polystyrene particles just starts beyond Re>140, 9.87 μm polystyrene particles undergo this rearrangement already at Re=100. As the equilibrium trajectories of these two particle groups are located at similar out-of-plane positions, outlet geometries that aim to separate particles along the channel width turn out to be a good choice for size fractionation. Indeed, polystyrene particles of different size assume laterally well-separated equilibrium trajectories such that a size fractionation of nearly 100% at Re=110 can be achieved. |
| Freie Schlagworte: | Size fractionation, Serpentine microchannel, Astigmatism Particle Tracking Velocimetry (APTV), 3D microparticle migration |
| ID-Nummer: | Artikel-ID: 22 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-239261 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Strömungslehre und Aerodynamik (SLA) |
| Hinterlegungsdatum: | 30 Apr 2024 11:34 |
| Letzte Änderung: | 02 Mai 2024 07:25 |
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| Zugehörige Links: | |
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| Suche nach Titel in: | TUfind oder in Google |
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- On the 3D distribution and size fractionation of microparticles in a serpentine microchannel. (deposited 30 Apr 2024 11:34) [Gegenwärtig angezeigt]
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