Here’s what I did:

1. I created a cube to represent the soil domain.

2. Following Step 2(c) of the tutorial, I created a cylinder inside the cube and used the Slice apart function to separate the soil and the tunnel zone.

3. Then, I added a FillBox ensuring that it covers the entire cylinder, with the FillPoint exactly at the center, where the 2D simulation domain passes.

4. In the GeoXPM tab, I enabled Autofill only for the soil domain, and disabled it for the cylinder (which represents the tunnel to be excavated later), as shown in the tutorial.

However, when I generate the particles, only the particles along the boundary of the cylinder are generated, and the interior remains empty.
I tried activating Autofill for the cylinder as well, and in that case, the particles are generated correctly, but when I run the simulation, the timestep becomes infinite and the simulation fails.

So, I’m not sure what’s going wrong.

Any help or suggestions would be greatly appreciated. I’m just trying to adapt the tutorial for a simple 2D tunnel excavation case.

Thanks in advance!

I am interested in knowing the deformation of soil in each steps and/or time rate and the other possibilities it possibly can