Welcome to the ONERA portal for benchmarking of flow reconstruction approaches!

This portal aims at providing a continuous development and benchmark tool for volumetric fluid flow reconstruction approaches. This includes sets of images for determining velocity (and possibly acceleration) vector fields via Lagrangian Particle Tracking (LPT) or Particle Tracking Velocimetry (PTV), and sequences of particle position or tracks in space for reconstructing dense flow fields (velocity and possibly pressure) via Data Assimilation (DA).

Datasets are free to download for everyone. Result upload can be done after creating an account, which also allows to receive regular news by email that we will issue about the portal (see News section below). Uploading a result in order to get an evaluation can be done without publishing the evaluation on the portal. For more information consult the Submission rules.

This portal will be in continuous development, with new test cases regularly added. External participation is also welcome! In case you are interested in suggesting a test case, please feel free to contact us at flow-benchmarks@onera.fr.

Available datasets

  • The first available dataset is the Two-Pulse case of the 1st LPT Challenge, held in 2020. Go to the page of the Two-Pulse case to have more information on the data and submit your result!
2nd LPT and DA Challenge announcement

Citation

When referring to the portal in your published or communicated work, please cite

Leclaire, B., Cornic, P., Champagnat, F., Fabre, E., & Calmels, F. (2022). A web portal for automatic performance evaluation of Lagrangian Particle Tracking and Data Assimilation algorithms. In 20th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, Lisbon, Portugal.

Additionally, to refer to a specific dataset, please cite

  • 1st LPT Challenge: Sciacchitano, A., Leclaire, B., & Schroeder, A. (2021). Main results of the first lagrangian particle tracking challenge. In Proceedings of 14th International Symposium on Particle Image Velocimetry (Vol. 1, No. 1, pp. 1-14). ILLINOIS Tech/Paul V. Galvin Library.

News

If you want to receive these news by e-mail (which will include the release of next test cases), simply create an account on our site (also necessary for result upload).

13.04.2025. Submission deadline of the 2nd LPT and DA Challenge extended! Following several requests, the due date for submitting results to the 2nd LPT and DA Challenge has been extended to April 29th.

07.04.2025. Result submission to the 2nd LPT and DA Challenge now open! Please upload your results for the LPT and/or DA Challenge until April 15th (included)! For more information, please consult the cases' pages.

31.03.2025. Additional information regarding Case 3 of the 2nd DA Challenge Case 3. Instructions of DA Case 3 pertaining to requested result have been completed. To consult the update, please download the case files!

14.03.2025. Upload forms of the 2nd LPT and DA Challenge open for format checks! Participants to the Challenge now have the possibility to upload sample files for the LPT and/or DA Challenge, in order to check whether their result formatting is right. Files uploaded will not be evaluated, nor considered as an official submission to the challenge.

31.01.2025. Datasets of the 2nd LPT and DA Challenge are released!

07.01.2025. Datasets of the 2nd LPT and DA Challenge coming soon! Datasets will be released by 31st of January. The due date for uploading results on this portal will be April 15th. Comparative analysis of the results will be presented during a dedicated workshop on June 25th in Tokyo, jointly with the ISFV21 and ISPIV2025 conferences.

11.07.2022. Opening of the portal in beta version, starting with the Two-Pulse case of the 1st LPT Challenge. For final debug purposes, evaluation is temporarily launched by a member of the developing team after a result has been uploaded. If you encounter problems or delays during your result submission, please contact us at flow-benchmarks@onera.fr.