Liquid in a cyclone

[JuhaHo]

Yet another failed simulation.

I made yet another request to Chaos support, if I could get support that way. Just a tiny bit of physics should do the jo.

Edit: So what is missing. There's no Vortex. Fluid just loses it's inertia forces and starts falling straight down - it should be basic physics and fluid dynamics.

[JuhaHo]

Is there anything I can do? In real life the liquid is moving fast to the marked level. In Phoenix FD it isn't. Is this some kind of inertial energy thing?

[georgi.zhekov]

Hmm, maybe you can add a vortex force only to the bottom part of the sim?

Here is a video that shows how you can make a force to be applied only in a specific region - https://youtu.be/oJEqnygpUqo?si=vGEeLFOOwm2uSvXe

[JuhaHo]

Thanks,

I'm back on the Path Follow approach. Not it seems to take a shortcut when in free air. Which parameter I would need to adjust?

[georgi.zhekov]

You might need to adjust a few parameters of the Path follow - the follow speed, the influence and the pipe radius.

You can try to make the follow speed and the influence higher and experiment with the pipe radius.

[JuhaHo]

I really don't know what to change. No matter, what I try fluid is moving too slowly when Follow path is used.

The Follow speed parameter does nothing even when most extreme values is being used.

[georgi.zhekov]

Is your pipe big or small enough? What if you decrease the pull speed and make the follow speed 10 000 times stronger?

[JuhaHo]

Thanks,

I increased the follow speed from the default 100 to 1100 and it seems to be working better. I think I'll let this run for a while.

[JuhaHo]

It's not good. Now the flow correctly starts rising in the middle. However, I want small amount of liquid to continue down until it reaches the bottom valve marked on the screenshot. It don't happen. How can I separate small portion of liquid aside?

[JuhaHo]

No it didn't work. I really would like to know how to solve the liquid in cyclone scenario. I'm back in square one after having already spent one year for this. I don't want to spend another, because I run out of money soon by making this. Before this happens, I really hope, someone in the community could take a look at this.

[georgi.zhekov]

Can you give us a reference of what you would like to happen?

[JuhaHo]

Thanks,

Fluid comes in from inlet on side. It travels down by circulating the outer ring until it reaches the narrow gap. There most of the liquid starts to raise in the middle of the cyclone while the fresh liquid is circulating near the wall and going down. Finally the clean liquid goes out from the top
outlet. Small amount of dirty liquid should fall to junk trap, while the clean liquid leaves the cyclone on top.

[georgi.zhekov]

Hmm, so which part do you have trouble with?

If it's about separating the liquid in two - you can use a Particle Tuner and make some particles to appear heavier by pushing them down. Here is a video of how this looks - https://youtu.be/mGAyh3uR89U?si=Ss9qgW1Z-JAkBGG1&t=2099

And in case you wish to create separate meshes based on the particle color (for the clean and for the dirty water) - here is how to make it work - https://youtu.be/jfE66K-vqYE?si=V4z6FSKqBXblzson

[JuhaHo]

Thanks again,

I was thinking if it's possible to animate the follow path helper. So in the beginning it should be off. After the system is filled it should be on until the junk trap is flushed.

Regarding dirty and clean liquid, the You suggested might be one additional idea. So far I have been working on a basis when the sand and stones are separated, the fluid becomes clean. However it might be a good idea change the liquid color as well.

[georgi.zhekov]

Yes, you can animate the follow path force - just add some keyframes and it should work correctly. You can animate the influence to 0 and it will be off and increase it when you wish to affect the fluid. You can also animate the other parameters of the force if needed.