2nd LPT and DA Challenge: DA cases

New: result submission now open!

To participate to the 2nd DA Challenge, please submit your results until April 29th (included) using the "Submit DA Results" button on the left. Please note that a user account is mandatory and that you must be logged in for your upload to be valid, and that your result should be uploaded together with a description of the algorithm used (in PDF format). If you intend to submit several cases, to limit file transfer times we advise that you do one submission per case.

Three DA cases are available, each addressing different physics:

  • Case 1 contains two-pulse (TP), four-pulse (FP) and time-resolved (TR) sequences of an incompressible turbulent channel flow, at various seeding densities
  • Case 2 consists of TR sequences of a compressible turbulent boundary layer at a Mach number of 4.9. Parameters explored are the separation time between pulses, the seeding density, and the inertial or non-inertial character of particles
  • Case 3 consists of TR sequences of Rayleigh-Bénard Convection at various seeding densities

Use buttons to the left to download each case (zip archive containing data and instructions).

Participants can submit results for any case and any acquisition strategy (i.e. TP, FP or TR) of their choice. Participation to several cases and acquisitions is of course encouraged. However please note that for each case and acquisition strategy selected, all seeding densities should be mandatorily submitted for participation to be accepted. Further rules may apply specifically to one of the cases (see related description in the corresponding zip archive).

Conventions for result formatting are similar for all cases, and can be done by adapting the following sample scripts in Matlab or Python.

A participant can submit several results on the same case and acquisition if these are obtained using different algorithms, i.e. algorithms relying on sufficiently different working principles. Submitting several results on the same case by only changing parameter tuning is not allowed.

Together with the results, participants will be asked to upload a description of the algorithm used. The corresponding deadline is April 29th, 2025 and upload will be accessible on the present page, from April 7th.