WG meeting in Zurich for WG1 and WG4

Monday 28 April

Attending online? Join here via MS Teams.

Meeting ID: 317 834 672 559 6

Passcode: 8M5B5H3G

Monday 28 April

09:00–12:00

Machine Learning for DEM (Hackathon)

(Coordinated by Deepak Tunuguntla)

Time: 09:00 hrs - 12:00 hrs

• The aim is to apply a few existing ML-based surrogate modelling developments for rotating drum data

• Links to the available rotating drum datasets

  • Yade - https://surfdrive.surf.nl/files/index.php/s/z4AMRCAOAFIZ4qG (Tri-axial data)

  • MercuryDPM - https://doi.org/10.5281/zenodo.15281830

  • Or feel free to bring your own rotating drum data

• List of techniques to pick from

  • Graph Neural Simulator (GNN-based)

    • https://www.geoelements.org/publications/gns3d/

    • https://github.com/geoelements/gns

    • https://github.com/GrainLearning/graphs

  • Universal physics transformer

    • https://github.com/ml-jku/UPT

  • NeuralDEM

    • https://arxiv.org/abs/2411.09678

    • https://nx-ai.github.io/NeuralDEM/

  • Simpler RNN

    • https://github.com/GrainLearning/grainLearning/tree/main/grainlearning/rnn

  • Simple surrogate model script

    • https://bitbucket.org/mercurydpm/mercurydpm/src/2c3ad7d1fb19b55a06230cf9451f39058e70a840/Drivers/Calibration/CalibrationTools/surrogate_models.py?at=feature%2FAWSCalibration

• Make sure to bring your coding hats and good laptops or at least have access to your university cluster to do some cool ML stuff

• As a sandbox, it would be great to have all our developments under one roof. That is by versioning our work in https://github.com/deepaktunuguntla/ON-DEM-WG1-AlternativeMethods

  • Pls make sure you have a github account

At the end of the hackathon (1200 hrs - 1230 hrs), we will have Hongyang give a live demo of how ML surrogates and DEM models can be combined for calibration

Coffee break 10:30-11:00

12:00-13:30

Lunch

13:30-14:00

DEM upscaling (Part 1)

(Coordinated by Hongyang Cheng)

13:30-13:40 Introduction by Hongyang Cheng

13:40-14:00 Presentation by Roxana Saghafian Larijani on the effects of coarse-graining for wet granular systems

14:00–14:20

Update from COST Association

(Giuseppe Lugano, COST Scientific Officer)

14:20–17:00

DEM upscaling (Part 2)

(Coordinated by Hongyang Cheng)

14:20-14:40 Presentation by Balázs Füvesi on the effect of coarse-graining on mixing indices for rotating drums

14:40-15:00 Update on the review paper

15:00-15:30 Coffee break

• 15:30-16:00 Overview of the questionnaire results

16:00-17:00 Review of coupled codes, including DEM, and decide on the method to use and problems to work on with WG1 participants

Tuesday 29 April

Joining online? Join here via MS Teams

Meeting ID: 330 001 390 791 5

Passcode: Gq7bX23G

Tuesday 29 April

09:00–12:00

Working on benchmarking problems:

• 5-10 min presentation from benchmark leads:

1. Particle to particle interactions – Bruno Chareyre/Danny van der Haven

2. Granular flows – Dalila Vescovi

3. Triaxial compression with periodic boundaries – Vasiliki Dimitriadi

4. Stability of stacked cubical particles – Yannick Descantes

• Benchmark Template discussion – Daniel Barreto

(Coordinated by Elizabeta Samec)

Coffee break 10:30 – 11:00

12:00 - 14:00

Lunch

14:00–17:30

Working on best-practice and guidance handbook:

• Handbook roadmap presentation (example: rotating drum)

• Creation of roadmaps* for other benchmarks (division into small groups)

• discussion on publishing (milestones, open access platform, authorship)

(Coordinated by Elizabeta Samec)

*Please bring your laptop and make a register on Confluence

Coffee break 15:30 – 16:00

Wednesday 30 April

09:30 - 11:30

“Informal” meeting to discuss progress of WG1 benchmarks - Location (face-to-face) to be defined depending on numbers.

Coordinated by Yannick Descantes and Daniel Barreto

Meeting organizers @Daniel Barreto @Yannick Descantes Please add the slides contributions from this meeting. @Anthony Thornton thanks making minutes please add them here as well. WG1 will create the 2 benchmark cases based on this and finalize our roadmap for the year.

13:30 - 18:00

Modelling of granular materials - Integrating data, computation, and physics - Organised by Collegium Helveticum.