Forums Technical Discussion FLIP Fluid sim inifinitely pulsating

FLIP Fluid sim inifinitely pulsating

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vlad_akihabara
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Joined: Nov. 2019
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I have a very noob question, I think every artist has experienced it. I have a simple sim - water inside the cup. I have only gravity force by default y = -9.8
When I simulate the water going down, colliding with the cup, water is also colliding with itself but the particles are moving forever. Even when I increase simulation frames to 500 it doesn't stop or lose energy.

How do you manage if you just need calm water inside a cup or something?
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Enivob
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Joined: June 2008
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Set your grid scale to 1.0 on the Fluid Object.
Disable reseeding on the FLIP Solver.
Change the Velocity transfer to APIC (Swirly) on the FLIP Solver.
Enable Viscosity on the FLIP Solver.
Set Viscosity to 0.1 on the Fluid Object Physical tab.
Drop down a Drag node after Gravity.

Those settings should get your fluid to settle down inside a cup.

Attachments:
flip_cup.gif (603.7 KB)
ap_flip_fill_cup_settle.hiplc (2.1 MB)

Using Houdini Indie 20.5
Windows 11 64GB Ryzen 16 core.
nVidia 3060RTX 12BG RAM.
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vlad_akihabara
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Joined: Nov. 2019
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Enivob
Set your grid scale to 1.0 on the Fluid Object.
Disable reseeding on the FLIP Solver.
Change the Velocity transfer to APIC (Swirly) on the FLIP Solver.
Enable Viscosity on the FLIP Solver.
Set Viscosity to 0.1 on the Fluid Object Physical tab.
Drop down a Drag node after Gravity.

Those settings should get your fluid to settle down inside a cup.
Yes, Drag force worked for me. Thank you a lot for the cool tips!
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