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Main results of the first Data Assimilation Challenge

Sciacchitano, Andrea und Leclaire, Benjamin und Schröder, Andreas (2021) Main results of the first Data Assimilation Challenge. In: Proceedings of 14th International Symposium on Particle Image Velocimetry, 1 (1), Seiten 1-13. ILLINOIS Tech / Paul V. Galvin Library. 14th International Symposium on Partilce Image Velocimetry 2021, 2021-08-01 - 2021-08-04, Chicago, USA (online). doi: 10.18409/ispiv.v1i1.198.

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Offizielle URL: https://doi.org/10.18409/ispiv.v1i1.198

Kurzfassung

This work presents the main results of the first Lagrangian Particle Tracking challenge, conducted within the framework of the European Union’s Horizon 2020 project HOMER (Holistic Optical Metrology for Aero-Elastic Research), grant agreement number 769237. The challenge, jointly organised by the research groups of DLR, ONERA and TU Delft, considered a synthetic experiment reproducing the wall-bounded flow in the wake of a cylinder which was simulated by LES. The participants received the calibration images and sets of particle images acquired by four virtual cameras, and were asked to produce as output the particles positions, velocities and accelerations (when possible) at a specific time instant. Four different image acquisition strategies were addressed, namely two-pulse (TP), four-pulse (FP) and time-resolved (TR) acquisitions, each with varying tracer particle concentrations (or number of particles per pixel, ppp). The participants’ outputs were analysed in terms of percentages of correctly reconstructed particles, missed particles, ghost particles, correct tracks and wrong tracks, as well as in terms of position, velocity and acceleration errors, along with their distributions. The analysis of the results showed that the best-performing algorithms allow for a correct reconstruction of more than 99% of the tracer particles with positional errors below 0.1 pixels even at ppp values exceeding 0.15, whereas other algorithms are more prone to the presence of ghost particles already for ppp < 0.1. While the velocity errors remained contained within a small percentage of the bulk velocity, acceleration errors as large as 50% of the actual acceleration magnitude were retrieved.

elib-URL des Eintrags:https://elib.dlr.de/144007/
Dokumentart:Konferenzbeitrag (Vortrag)
Zusätzliche Informationen:https://doi.org/10.18409/ispiv.v1i1, https://www.iit.edu/ispiv2021, Paper 178
Titel:Main results of the first Data Assimilation Challenge
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Sciacchitano, Andreaa.sciacchitano (at) tudelft.nlNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Leclaire, Benjaminbenjamin.leclaire (at) onera.frNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schröder, Andreasandreas.schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262NICHT SPEZIFIZIERT
Datum:August 2021
Erschienen in:Proceedings of 14th International Symposium on Particle Image Velocimetry
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:1
DOI:10.18409/ispiv.v1i1.198
Seitenbereich:Seiten 1-13
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
Christensen, Kenneth T.Kenneth.Christensen (at) iit.eduNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Verlag:ILLINOIS Tech / Paul V. Galvin Library
Name der Reihe:Conference Proceedings
Status:veröffentlicht
Stichwörter:Challenge, Synthetic experiment, Lagrangian Particle Tracking, Data assimilation, Navier-Stokes-Equations
Veranstaltungstitel:14th International Symposium on Partilce Image Velocimetry 2021
Veranstaltungsort:Chicago, USA (online)
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:1 August 2021
Veranstaltungsende:4 August 2021
Veranstalter :Illinois Institute of Technology
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Effizientes Luftfahrzeug
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L EV - Effizientes Luftfahrzeug
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Flugzeug und Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren, GO
Hinterlegt von: Micknaus, Ilka
Hinterlegt am:07 Jan 2022 17:38
Letzte Änderung:24 Apr 2024 20:43

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