Flip-Fluid Invert-Sign volume issue..!

[Masoud]

Hi guys,

In a Flip-Fluid simulation, I want the fluid particles to enter and trap in a closed collision volume (I mean an Invert-Sign volume).

I applied these settings:

1) "Static Object->Collisions->Volume->Invert Sign" to on.

2) "Flip Solver->Volume Motion->Collisions-> Transparency" to on.

3) "Flip Solver->Volume Motion->Collisions-> Transparency" value to 1.

 

As you can see in my preview video below, the fluid flows strangely!

How can I fix it?

 

Thanks for helping.

Fluid_Invert Collision_01.hip

[Masoud]

 

I turned the "Volume Motion->Collisions->Surface Extrapolation" to zero and now the fluid motion is better, outside of the collision volume.

There is still a gap between the fluid and an invisible bounding box around the collision geo.!

And the fluid sinks!

[Atom]

Perhaps check out this post. Alejandro demonstrates how to inject particles from outside the domain into a container.

 

Edited May 8, 2024 by Atom

[Masoud]

Hi Atom, 

Thank your for the link. When I download the file to review, it doesn't shows the particles and the only thing I see is this:

[Atom]

Somewhere along the line since H16, when the file was authored, a bug was fixed that requires new flip points to actually exist in group named "particles". Try adding a group name to the particles supplied to the source volume node.