Liquid flows as if it flows on stairs

[denx]

Hi,

I tried the "liquid_flowing" preset with a rotated box. Whenever the liquid flows down the box, it flows as if it flows down a stairway:



It is a simple box without subdivisions etc.

What could be the problem?

Thank you very much!

[denx]

I am actually very happy with the simulated water... if there were only no lines...



Like I said... the surface is a plane box... I do not know where those lines come from...

[Ivaylo Katev]

i think this is caused by the voxelization of the geometry, the inclined surfaces become "stairs" and this causes the lines. the flip solver has better behavior in such situations, you can ask for nightly build access and use it, but keep in mind that is still under construction.

[denx]

Thank you, Ivaylo.

No other chance or tip to let the liquid flow down a plane (like a shower area) just as it would flow in real life, I guess?

[Raven]

Hey Denx

Try rotate your grid so that it is parallel to your plane, that should eliminate the visible stepping on the plane.

[denx]

Hi Raven,

thanks!

The problem is: The water should be able to run away / fall downwards through a hole.

[Raven]

This is still possible, I am just suggesting that you align the grid so that it minimises grid artefacts.
This wont work if you have multiple planes with different gradients, but it should work if you have just one plane and it's gradient is linear.

[Ivaylo Katev]

yes, if there is only one plane this will work.

[denx]

If there is only one plane, the water falls through the plane.

[Ivaylo Katev]

set circumscribed voxelization mode, but better ask for nightly access and use the flip

[denx]

I wrote an E-Mail to the support.

Thank you all for 'your' support.

[denx]

set circumscribed voxelization mode, but better ask for nightly access and use the flip

Where could I find this mode in the official release?

Edit: Found it, thanks.

[denx]

It looks much better now with the flip option.

Would you set the voxel option to circumscribed, anyway?

[Ivaylo Katev]

the flip solver ignores this option, the particles are interacting directly with the geometry surface

[denx]

Thank you very much!