FLIP Particle separation issue (particles disappears)

[marles]

Hi everyone,

I got an issue with the particle sepration setting.
I'am making a vortex in flip, when i set my particle separation to 0.1 to get a fast preview of my sim, all works well. But then when i set the particle separation to 0.05, my simulation looks weird. It's look like the tank is loosing a bunch of his particles, and the flip's level surface get down. I don't understand why the particle separation breaks my simulation. I knew this setting can change a few things in your sim but here i'm loosing a lot of particles.... and it' happen all the time as i set my particle separation under 0.06

here is a flipbook of the simulation at 0.12 (no issue):

https://www.dropbox.com/s/y36uz2oxl6jl7jv/RenderTest0.12.mov?dl=0


here is a flipbook of the simulation at 0.05 (issue start around the frame 96):
https://www.dropbox.com/s/5w3uv9r3hzocc90/RenderTest0.05.mov?dl=0

Here is my hip:
FlipWhirlpool02issue.hipnc

If someone know how can i fix this isuue, i'm listening all kind of tips, Thanks a lot for your help (currently i'm not able to cache this sim properly).
ps: if the quality video is poor, download the link, it's because of the dropbox streaming.

Marles

[marles]

Hi, there is some new stuff, 

After few test i noticed when i disable the "particle separation" in the flip solver (particle motion tab), i don't have anymore this probleme (the volume doesn't reduce). That's cool but i'm a bit confused because i don't understand why the particle separation option make my volume reducing ? If someone can explain me the reason, it would be great