Thin Geometry?

[phildlight]

So I'm a brand new Phoenix user and was a little scared after buying and then finding some issues, but at this point I'm actually very happy with it!

I do seem to be having an issue with thin geometry though. See image:



You can see I'm doing a sort of water wall or waterfall effect and I noticed the fluid didn't seem to be interacting with the thin panels (I smeared the panel profile because I'm not really supposed to share). So I put a big box in the flow to make sure it was interacting with objects correctly and it behaved as expected. So then I put a thin box in the flow next to it and you can see the fluid passed through it.

Is there a setting I'm missing? Does the grid have to be smaller than the thinnest geometry? I hope not!

The scene is scaled correctly and the units are setup the same as the scene scale etc. Below are the settings:



Thanks!

[Ivaylo Katev]

thin objects are problematic when the object voxels mode is different from circumscribed. but i recommend to use thick enough objects and inscribed mode, this helps to the rendering

[phildlight]

Thanks Ivaylo. For this situation, I decided to just copy the thin geometry and make it much thicker in the back so the face/interaction side has the same profile and just make it not renderable and excluded the thin geometry as not to complicate the sim. Same could be done for the thin plane perpendicular to the flow.

I actually did play w/ all 3 voxel modes and didn't really see any difference. Is there a min thickness that it can deal w/ in real world units?

Great work on Phonenix btw...

[Ivaylo Katev]

I actually did play w/ all 3 voxel modes and didn't really see any difference.

that's disturbing...

[phildlight]

LOL. Here's what I found. I put a thin .25"/6.35mm box in the flow and used inscribed voxel mode and PHX ignored it. I then increased it to .5"/12.7mm thick and it had the proper effect. Interestingly, I was able to get it to interact with a .05"/1.27mm using circumscribed mode. It seems circumscribed is more sensitive to thin geometry? I'm not sure why this didn't seem to have an effect before? Maybe I had something else screwed up. The thing is, with inscribed and thicker geometry I'm getting the effect/results I'm after. With thin geometry and circumscribed it seems very erratic. Probably why you said you recommend inscribed and thick enough geometry

[Ivaylo Katev]

that's what i'm expecting
i recommend inscribed+thick geometry because if you use circumscribed the borders are visible, ant they are ugly in the most cases. the inscribed mode hides all the ugliness in the geometry