FLIP - Awaken by Geometry

[ParticleSkull]

Hey guys, is there something like the grains shelf tool "Awaken by Geometry" to work on FLIP? Or just some way to keep a flip tank settled/static.

I need to have a flat surface of water (i'm doing it with a flip tank) but I need it to be very flat, like a mirror, and only move where the object touch.

That's what happens as soon as I start the simulation:

Thank's

[cgcris]

Hi Alvaro,

 

I think it's because you have jitter set on the emitter, set it 0.

[ParticleSkull]

Hey Cristobal, thx! But I couldn't find any jitter parameter on the flip tank sim.

In fact I've realized that the water stay steady when I have no gravity on the scene. I'm wondering, with no gravity, the particles aquire some velocity when the torus touch them. Could I use this velocity to activate a pop force?

Something like @v != 0 on the activation field of the force? 

Thanks again

[ParticleSkull]

In fact i've should used a VEXPression to make it work. (Thx to Ben Watts' Falling Angel tutorial)

 

Altough it's not working the way i've expected. Anyone have any other idea in mind?

Thanks

[Atom]

I created a default FLIP tank and set the jitter scale to 0. Then in the FLIP Object Initialize Velocity to 0,0,0. In the FLIP Solver turn off Apply External Forces. This seemed to give me a completely still tank.

ap_still_flip_tank.hipnc

Edited April 15, 2016 by Atom

[ParticleSkull]

Hey Atom, unfortunatelly the Gravity is gone when I switch off the Apply External Forces

[johner]

Are you using the Scatter option on the Particle Fluid Tank SOP? Those extra surface particles can help create a smoother surface to start.  

 

Another option is to use APIC (Swirly Kernel) which cuts down on surface noise.  Or use APIC and run 20-30 frames until the fluid settles down, write those particles to disk, then use them as the initial state for a regular (possibly Splashy Kernel) FLIP sim.

[ParticleSkull]

Hey John,

I've done some tests with APIC +  a drag force, running the sim for a few frames and it looks like it will work properly. Thx!!!