Brockmann, Philipp ; Hussong, Jeanette (2021)
On the calibration of Astigmatism particle tracking velocimetry for suspensions of different volume fractions.
In: Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow, 62 (1)
doi: 10.1007/s00348-020-03120-4
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In the present study, we demonstrate for the first time how Astigmatism Particle Tracking Velocimetry (APTV) can be utilized to measure suspensions dynamics. Measurements were successfully performed in monodisperse, refractive index matched suspensions of up to a volume fraction of Φ = 19.9%. For this, a small percentage (Φ < 0.01% ) of the particles is labeled with fluorescent dye acting as tracers for the particle tracking procedure. Calibration results show, that a slight deviation of the refractive index of liquid and particles leads to a strong shape change of the calibration curve with respect to the unladen case. This effect becomes more severe along the channel height. To compensate the shape change of the calibration curves the interpolation technique developed by Brockmann et al. (Exp Fluids 61(2): 67, 2020) is adapted. Using this technique, the interpolation procedure is applied to suspensions with different volume fractions of Φ < 0.01%, Φ = 4.73%, Φ = 9.04%, Φ = 12.97%, Φ = 16.58% and Φ = 19.9%. To determine the effect of volume fraction on the performance of the method, the depth reconstruction error σz and the measurement volume depth Δz, obtained in different calibration measurements, are estimated. Here, a relative position reconstruction accuracy of σz/Δz = 0.90% and σz/Δz = 2.53% is achieved for labeled calibration particles in dilute (Ф < 0.01%)and semi-dilute (Φ ≈ 19.9%) suspensions, respectively. The measurement technique is validated for a laminar flow in a straight rectangular channel with a cross-sectional area of 2.55 × 30 mm². Uncertainties of 1.39% and 3.34% for the in-plane and 9.04% and 22.57% for the out-of-plane velocity with respect to the maximum streamwise velocity are achieved, at solid volume fractions of Ф < 0.01% and Φ = 19.9%, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Brockmann, Philipp ; Hussong, Jeanette |
| Art des Eintrags: | Bibliographie |
| Titel: | On the calibration of Astigmatism particle tracking velocimetry for suspensions of different volume fractions |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2021 |
| Ort: | Berlin ; Heidelberg |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow |
| Jahrgang/Volume einer Zeitschrift: | 62 |
| (Heft-)Nummer: | 1 |
| Kollation: | 11 Seiten |
| DOI: | 10.1007/s00348-020-03120-4 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In the present study, we demonstrate for the first time how Astigmatism Particle Tracking Velocimetry (APTV) can be utilized to measure suspensions dynamics. Measurements were successfully performed in monodisperse, refractive index matched suspensions of up to a volume fraction of Φ = 19.9%. For this, a small percentage (Φ < 0.01% ) of the particles is labeled with fluorescent dye acting as tracers for the particle tracking procedure. Calibration results show, that a slight deviation of the refractive index of liquid and particles leads to a strong shape change of the calibration curve with respect to the unladen case. This effect becomes more severe along the channel height. To compensate the shape change of the calibration curves the interpolation technique developed by Brockmann et al. (Exp Fluids 61(2): 67, 2020) is adapted. Using this technique, the interpolation procedure is applied to suspensions with different volume fractions of Φ < 0.01%, Φ = 4.73%, Φ = 9.04%, Φ = 12.97%, Φ = 16.58% and Φ = 19.9%. To determine the effect of volume fraction on the performance of the method, the depth reconstruction error σz and the measurement volume depth Δz, obtained in different calibration measurements, are estimated. Here, a relative position reconstruction accuracy of σz/Δz = 0.90% and σz/Δz = 2.53% is achieved for labeled calibration particles in dilute (Ф < 0.01%)and semi-dilute (Φ ≈ 19.9%) suspensions, respectively. The measurement technique is validated for a laminar flow in a straight rectangular channel with a cross-sectional area of 2.55 × 30 mm². Uncertainties of 1.39% and 3.34% for the in-plane and 9.04% and 22.57% for the out-of-plane velocity with respect to the maximum streamwise velocity are achieved, at solid volume fractions of Ф < 0.01% and Φ = 19.9%, respectively. |
| Freie Schlagworte: | Engineering Fluid Dynamics, Fluid- and Aerodynamics, Engineering Thermodynamics, Heat and Mass Transfer |
| ID-Nummer: | Artikel-ID: 23 |
| Zusätzliche Informationen: | Part of a collection: Applications of Laser and Imaging Technique to Fluid Mechanics. 20th International Symposium in Lisbon 2020 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 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: | 27 Mär 2024 09:55 |
| Letzte Änderung: | 27 Mär 2024 09:55 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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On the calibration of Astigmatism particle tracking velocimetry for suspensions of different volume fractions. (deposited 26 Mär 2024 13:55)
- On the calibration of Astigmatism particle tracking velocimetry for suspensions of different volume fractions. (deposited 27 Mär 2024 09:55) [Gegenwärtig angezeigt]
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