Flip particles disappearing after collision

[WesleyE]

Hi everyone,

I'm looking to build a simple glass fill animation but I've stumbled onto a problem before I could even begin the animation.

I'm using a flip fluid that has some initial data from a SOP object. I've also made a glass that I want the flip fluid to collide with. I had some problems generating a valid SDF for the collision, but I have seemed to solve that by adjusting the offset on the isooffset node.

If I feed the generated collision SDF to the flip solver, the particles start to behave in a weird way. They seem to remove themselves from the sim when they touch the glass. I've added an image demonstrating the problem in 3 frames and is also showing the collision geometry.

Can anyone point me to the reason why the particles are disappearing?

Thanks

Glass.hipnc

[Fabiano Berlim]

Sometimes Houdini Flip can't manage very well thin collision geometry, so you need to construct a thick bowl geometry around the glass.

[ikarus]

The collision sdf for your object maybe be of fine resolution but the actual collision field of the flip object probably isnt. There's a parameter for collision field resolution which you should enable enforce a higher resolution of the collision field so it can sample your glass sdf better.

Also what fabiano said, that will make things much easier.

[ryew]

You might want to check out Peter Quint's wine spill tutorial, which sounds similar to what you're doing: http://vimeo.com/15490394

[hb4k]

Hi... I ´ve already have a collider really extruded and big... But the particles still dissapear... for no reason.. They are inside the BBOX so... Any help will be appreciated!

 

Thank you very much in advance!