Why does my FLIP sim 'break' when I reduce the size?

[art3mis]

Hi

Creating a simple FLIP simulation with some geometry(extruded letters) falling into a FLIP tanl. I originally created my tank at a size of 4 x 21 x 18

But then I realized if I want to create a 'table top scale' simulation, I needed to reduce the size of my FLIP tank.

So I changed it to .4 x 2.1 x 1.8.

I kept everything else the same except I also reduced the size of my falling geometry (the letters HELLO) to 10% of their original size.

My Particle Separation remained the same at .025. My Feedback value remained the same at 0.4

But, when I run the simulation, it seems to 'break'. ie there is NO splash at the surface.

Do I need to alter some other parameter, ie Density, or increase my Feedback?

Why shouldn't the simulation work more or less the same if I am keeping my Particle Separation consistent?

Attached are a few screen grabs

Edited November 1, 2016 by eco_bach

[Atom]

You may not have enough Volume density on your letters for them to register as collision objects, thus no splash.

[art3mis]

Thanks Atom. Will give that a try.

I'm only half joking when I say SESI should be compensating you for your amazing contribution to this community!

[art3mis]

Came across this old thread with a supplied file from johner(illusionist). Going to study it and see what makes sense. I assumed to get accurate FLIP sims you need to work to scale, but apparently that's not the case.