Help How to set diffuse of liquid correctly?

[Chua Polar]

What is the correct range of liquid diffuse? And is it relative to the diffusion data size?
When I set the diffuse of the 2 chemical liquids in LiquidMixing sample, I got these visual and log errors in the video.

[josemendez]

What is the correct range of liquid diffuse? And is it relative to the diffusion data size?
When I set the diffuse of the 2 chemical liquids in LiquidMixing sample, I got these visual and log errors in the video.

Hi!

Diffusion is specified as % of diffusion per second. Not relative to the size/range of the diffusion data.
Can't see ay log errors attached to your post :/

[Chua Polar]

the video was too big.
It seems I can't post the image?

The video:
https://drive.google.com/file/d/1aC2vYqi...sp=sharing

[josemendez]

the video was too big.
It seems I can't post the image?

The video:
https://drive.google.com/file/d/1aC2vYqi...sp=sharing

Hi!

Unfortunately it's not possible to upload videos to the forum directly, as that would skyrocket my hosting costs. Any video or large file uploaded, I have to pay to host it! hope you understand  Hosting on youtube, drive, etc and posting a link is the way to go.

The video you linked to is fun, but unrelated to Obi . Maybe you mixed up the links?

cheers,

[Chua Polar]

Hi!

Unfortunately it's not possible to upload videos to the forum directly, as that would skyrocket my hosting costs. Any video or large file uploaded, I have to pay to host it! hope you understand  Hosting on youtube, drive, etc and posting a link is the way to go.

The video you linked to is fun, but unrelated to Obi . Maybe you mixed up the links?

cheers,

It was the wrong link LOL.


https://drive.google.com/file/d/1qw6OaQ8...sp=sharing

[josemendez]

It was the wrong link LOL.


https://drive.google.com/file/d/1qw6OaQ8...sp=sharing

The sample script being used (ObiPropertyColorizer) makes use of unity's animation curves, whose Evaluate() method only takes values between 0 and 1.

A value of 1 for diffusion is extremely large, so it will cause diffusion to overshoot (keep in mind that diffusion is time-dependent, and so subject to cfl stability conditions). The overshot diffused values will then go way beyond the 0-1 range, and since the sample script does not check for this----> error.

Just use a much smaller diffusion value, for instance 0.005. If you need very high diffusion values, you'll need to reduce your simulation's timestep size.

Checking for a valid 0-1 range in the sample script would make the error in the console go away, but still the fluid colors would vary wildly due to the high diffusion.

[Chua Polar]

The sample script being used (ObiPropertyColorizer) makes use of unity's animation curves, whose Evaluate() method only takes values between 0 and 1.

A value of 1 for diffusion is extremely large, so it will cause diffusion to overshoot (keep in mind that diffusion is time-dependent, and so subject to cfl stability conditions). The overshot diffused values will then go way beyond the 0-1 range, and since the sample script does not check for this----> error.

Just use a much smaller diffusion value, for instance 0.005. If you need very high diffusion values, you'll need to reduce your simulation's timestep size.

Checking for a valid 0-1 range in the sample script would make the error in the console go away, but still the fluid colors would vary wildly due to the high diffusion.

Got it!