Physic particles phasing through collision surfaces

Physics Simulation PhysicsNeMo-ML Model Framework Technical Support (PhysicsNeMo Only)
1

Hello.

I’m working on water simulation involving flowing water through a funnel and hallow box, and has encountered issues with particles leaking through collision surfaces.

Referring to the video, the first collision model has large amounts of vertices, and much of the particles leaked through it.
The leaking can be reduced by reducing the amounts of vertices on the collision model.
However, the phasing still occurs when there are enough particles cluttering together, you can see the particles at the bottom moving quite erratically, some popping out of the collision meshes.

I have tried various methods to reduce the leaking, increasing particle contact offset or decreasing gravity, the video is the best result I can get. Any further manipulation to the particles’ physics would make the result inaccurate and not ideal.

Is there a fix to this issue?

Many thanks.

2

Hello again.

After more tinkering, I found that the particle phase-through issues can be mitigated by increasing “Time Steps Per Second” in PhysicsScene.

This didn’t stop all the particles from phasing through all the collision surface, but the amount has reduced down to an acceptable level.