Hi.
I'm new at houdini.
I'm trying to create a simulation where particles affect smoke.

I started simple.
A box that rotates and acts as a collider for pyro.
Gif Link [gifyu.com]


After this mini-project was successful, I tried to apply the principle to a POP simulation.
Unfortunately without success.
Gif Link [gifyu.com]


It would be great if someone could take a look at the hip file to show me the right direction.
I think im missing something.

Your particles are too small and or not moving fast enough to make a noticeable impact on the smoke simulation. You can visualize the velocity field in the pyro ‘Smoke Object’ node in your dop network. You can see they're making a small dent in the smoke sim. Hard to see in the viewport, but might be visible in render.

Thank you reuben94.
I have completely rebuilt the setup again.
This time I did not use the satic object node anymore.
Instead I converted the particles to VDB and added them as volume source / collision to the pyro setup.

For all who are interested here is a gif and the project file.

Gif Link [gifyu.com]