Water splashes colliding against static objects.

[veldkoning]

Hi,

Maybe I am doing something wrong, but I would like to collide water splashes (ocean waves) against static objects within PhoenixFD (latest nightly build 20211111) in a stormy ocean.
I have setup a FD liquid with a Wave Force element and I get some nice waves. I have setup some Splash and Mist which works great on the waves. But when I add a cylinder inside my scene and set the Phoenix properties "Make Body Static (simple Concave)"
Nothing reacts with the cylinder. I get no particles around my cylinder.

[veldkoning]

Anyone? I am trying to find an answer and I can't find it in the manual.

[slavina.nikolova]

Hey,

Will it help if you increase the speed of the water - you can do that by increasing the Control by Wind Speed value. Another important thing is the Grid Resolution - you might need to increase that value as well.

Here you can find more information about the FLIP Particles Life Cycle - https://docs.chaos.com/display/PHX4M...les+Life+Cycle


Hope this helps!

[veldkoning]

Hi Slavina,

Thks! I am now at 50mil. cells and my scene has a 1:1 scale, but I will give it try.

[Svetlin.Nikolov]

Hey,

Just a note - by default every geometry you place inside the Phoenix simulator is an obstacle - you don't need to change anything because the Solid option is ON and this means the fluid will collide with the geometry. Check this tutorial for more info: https://docs.chaos.com/display/PHX4M...ies+QuickStart

The option you mentioned - Make Body Static - is an option of Active Bodies. Active Bodies are simulated rigid bodies which the liquid can push and which can float over the liquid - like debris, boats, etc. Sounds to me like you don't need Active Bodies in your setup at all, so it's best to leave this option OFF like it was by default. Here you can find out more about Active Bodies: https://docs.chaos.com/display/PHX4M...e+Bodies+Guide

So getting back to your screenshot, the liquid mesh seems to fold around both geometries, so it seems they are already interacting as obstacles. Maybe you just need a bigger splash? Can you share the settings of your Wave Force? Maybe you must increase the Fluid Freedom option, or maybe in general your liquid moves too slow?

Cheers!

[veldkoning]

Hey,

Will it help if you increase the speed of the water - you can do that by increasing the Control by Wind Speed value. Another important thing is the Grid Resolution - you might need to increase that value as well.

Here you can find more information about the FLIP Particles Life Cycle - https://docs.chaos.com/display/PHX4M...les+Life+Cycle


Hope this helps!

I tried increasing the speed of water inside the PhoenixFDoceanTexture. (from 15 to 30). The grid is around 20 mil. for a test simulation, but the collision has no effect. Do I need to activate Active Body (make Body Static) inside the Phoenix Props for 1 Node?
In previous Chaos tutorials the rocks (river) and rocks (beach waves) they are not active inside chaos Phoenix Properties. Does the scene scale has any effect? Everything is now 1 meter.

Thanks.

[veldkoning]

Hey,

Just a note - by default every geometry you place inside the Phoenix simulator is an obstacle - you don't need to change anything because the Solid option is ON and this means the fluid will collide with the geometry. Check this tutorial for more info: https://docs.chaos.com/display/PHX4M...ies+QuickStart

The option you mentioned - Make Body Static - is an option of Active Bodies. Active Bodies are simulated rigid bodies which the liquid can push and which can float over the liquid - like debris, boats, etc. Sounds to me like you don't need Active Bodies in your setup at all, so it's best to leave this option OFF like it was by default. Here you can find out more about Active Bodies: https://docs.chaos.com/display/PHX4M...e+Bodies+Guide

So getting back to your screenshot, the liquid mesh seems to fold around both geometries, so it seems they are already interacting as obstacles. Maybe you just need a bigger splash? Can you share the settings of your Wave Force? Maybe you must increase the Fluid Freedom option, or maybe in general your liquid moves too slow?

Cheers!

Hi Svetlin,

Thanks for your comments. Yes, I need a big splash! I turned Body Static off, so everything should be as default.
Strenght:5
Massive WaveForce : 0.5

[Svetlin.Nikolov]

Hey, there seems to be some problem with the attachment and I can't open it. Can you attach it again?

[veldkoning]

Hey, there seems to be some problem with the attachment and I can't open it. Can you attach it again?

Thumbnail is fixed!
I see something happening when changing the Massive Waveforce to zero.

[Svetlin.Nikolov]

Ah, okay, so you are looking at the ocean with displacement in the viewport. How does it look if you go to the Simulator's Rendering rollout and turn off "Displacement"? Do you see the effect of the waves splashing onto the geometry?

[veldkoning]

Ah, okay, so you are looking at the ocean with displacement in the viewport. How does it look if you go to the Simulator's Rendering rollout and turn off "Displacement"? Do you see the effect of the waves splashing onto the geometry?

But now the Wetmap is behaving strange.

[veldkoning]

Ah, okay, so you are looking at the ocean with displacement in the viewport. How does it look if you go to the Simulator's Rendering rollout and turn off "Displacement"? Do you see the effect of the waves splashing onto the geometry?

I have send the file to support@chaosgroup.com

[veldkoning]

Why is this happening? The wetmap particles are not in place?

[Svetlin.Nikolov]

Hey, are the wetmap particles offset even with the Displacement OFF? And even after you simulate again?

[veldkoning]

Hey, are the wetmap particles offset even with the Displacement OFF? And even after you simulate again?

The problem was inside the fluid particles. I have deleted the cache but that didn't solved the problem. I deleted the Liquid node and now it works!