Initial Fill - Fluid Losing Volume

[fexmedia]

Hi,
I created a glass with an ice cube inside. For the fluid I have an object with initial fill selected.
When I start the simulation, the fluid starts to shrink down drastically.

The ice cube is inside the initial fill object. But it has "Solid" and "Clear Inside" selected.
The ice cube also has some air bubbles inside - the bubbles are a separate mesh and the normals are reversed for render purpose.
I also have some turbulence inside the scene to animate the water.

Simulation Setup:
- Scene Scale = 3
- Cell Size = 0.08
- Steps per Frame = 7

Someone knows what might causes the water to shrink?

[Svetlin.Nikolov]

Hey,

Try unchecking Clear Inside first - there is a know issue with Solid + Clear Inside which is fixed in the latest nightlies, so you might get one as an even better solution. In general, for FLIP liquids, Solid + Clear Inside does not make any more sense than just Solid, because particles die inside solid objects anyway.

However, reversing the normals might also be an issue - if the above still don't resolve it, you might try replacing the ice cube with a simple cube or sphere just for the test.

Cheers!

[fexmedia]

Hi,
thank you for the answer.

I unchecked "Clear Inside" from the cube, but when the cube is moving, the water starts to lose some volume again. Not so drastically anymore, but still noticeable. Same happend with a new simple mesh.

[Gosho.Genchev]

Hey fexmedia , could you share your scene file (my email is my name here at chaosgroup dot com) so I can check it out ? I've tried replicating the problem but sadly, it doesn't happen with my setup.
It would also be really helpful if you could tell us what build you're using.

Cheers

[Svetlin.Nikolov]

Yup, please first make sure you are using a latest nightly build.

Cheers!

[bair_tsyrenov]

Hi, have you found a solution to this problem?
My water volume is also decreasing.
After shaking the bottle, in which 2 more objects are located.
I didn't add objects anywhere, I didn't do anything in the settings, since they automatically interact in the simulation volume

[georgi.zhekov]

Hi, have you found a solution to this problem?
My water volume is also decreasing.
After shaking the bottle, in which 2 more objects are located.
I didn't add objects anywhere, I didn't do anything in the settings, since they automatically interact in the simulation volume

Can you show us the settings that you use and how it looks? Generally increasing the scene scale and the steps per frame should help with the volume loss.

Is there any deforming geometry in the scene?

[bair_tsyrenov]

Hello, this settings.
Now, im use 2nd Liquide sourse inside bottle)
Go to try increase simulation scale, Thank you!

[Joelaff]

I was running into similar problems in a similar (ice cubes in a glass) scene. I ended up increasing the scene scale and steps per frame and it finally worked. I got that stable and then used one of those cache frames for a Load and Start operation to simulate from there so I didn't have to re-calc the static water. But I was still have volume issues.

This was PHX build 31770 on Max 2021

Edit: I also had issues where even after the Load and Start the liquid moved too much. So I set up a particle tuner to set a maximum velocity for the liquid particles. This ended up working well for my needs (carbonated beverage bubbling in an already-poured state).