WG2 - Going closer to physics

Driver	@Hrachya Kocharyan @cathosull
Approver
Contributors	@Hrachya Kocharyan @cathosull @Kevin Hanley @John P. Morrissey @Radan Ivanov, Katia Boschi, Dalila Vescovi, Vasileios Angelidakis,
Informed
Objective	This Working Group will focus on actions to achieve more realistic numerical modelling of physical processes.
Due date
Key outcomes	D2.1. (M12) – Technical report including (i) short list of model materials with typical and academical physical properties (quasi- perfect spherical powders, polyhedral shapes, cohesiveness, etc.), and (ii) an inventory oy experimental equipment accessible by the Action. D2.2. (M24, M36 and M48) – Three journal papers, each considering at least one shortlisted problem that has been modelled both experimentally and numerically for validation/benchmarking purposes. Each of these outputs will be complemented by a well-documented database for proposing different modelling strategies and developing calibration procedures on different DEM codes.
Status	in progress

Problem Statement

This Working Group will focus on actions to achieve more realistic numerical modelling of physical processes. These include (i) a better representation of particle shape in DEM simulations, (ii) enhancing existing contact laws (iii) strategies for monitoring energy, momentum and mass conservation. To achieve such objectives, this WG will carry out both experimental and numerical campaigns. Experiments will be conducted on a list of model materials that will be initially established by the WG.

Scope

Must have:	A database of experimental equipment available for the action to carry out the experimental campaign A portal to collect comprehensive information on various contact models, implementations and codes Three journal papers, each considering at least one shortlisted problem.

Must have:	A database of experimental equipment available for the action to carry out the experimental campaign A portal to collect comprehensive information on various contact models, implementations and codes Three journal papers, each considering at least one shortlisted problem.
Nice to have:
Not in scope:

Timeline

Lane 1

Lane 2

Feature 1

Feature 2

Feature 3

Feature 4

iOS app

Android app

Milestones and deadlines

Milestone	Owner	Deadline	Status

Milestone	Deadline	Status
Subgroup 2-1 – managing experimental campaign
D2-1.1 – making a full inventory of experimental apparatus available in the Action for running pertinent characterization of the model materials	November 2024	Done. Can be accessed below
D2-1.2 – running experiments with the equipment inventoried at D2-1.1 with the model materials defined in D2.1	January 2026
D2-1.3 – collecting results provided at D2-1.2 and building an experimental database	November 2026
Subgroup 2-2 – managing numerical campaign
D2-2.1 – building a list of contact models to simulate materials defined at D2.1	November 2024	Partially done. This is within the portal, on which the work is still ongoing
D2-2.2 – building a list of typical shapes to simulate the model materials defined in D2.1	November 2024
D2-2.3 – implementing contact models defined in D2-2.1	January 2026
D2-2.4 – implementing collision detection algorithm for shapes defined at D2-2.2	January 2026
D2-2.5 – carrying out simulations on different DEM codes with the contact model defined at D2- 2.1 and/or the shapes defined in D2-2.2 to reproduce the experimental results given at D2-1.3	November 2026

D2.2. (M24, M36 and M48) – Three journal papers, each considering at least one shortlisted problem.

Reference materials

Experimental equipment inventory