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Maintain smoke in a specific area


flcc

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Hi
i facing  problem with a smoke sim I have to do. I want my smoke stay within an "elliptical" area.
I want this smoke a bit "hairy". sort of magical smoke.

this is what I get.

5ed7c6fdd434f_Capturemidsim.thumb.jpg.725650bf18f0f70eb39d4808c9b50e76.jpg

I'm pretty happy with this but, while the movement speed are ok, over time the smoke tends to slowly expand.

5ed7c7036cca6_Captureendsim.thumb.jpg.b84c57ac2ca1d9f7800cb43d8884cf57.jpg

 

I've try some tweaking between mostly between dissipation and disturbance, but in short
it's hairy vs stable. Less hairy more stable, more hairy -> expand.
I've also try to supress temperature and juste inject some speed withe a curl noise but don't get expected results.

What is the best way to get a smoke "confined" to a specific area ?

brainFog.hipnc

FogBrain_v2b.mp4

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there is a shelf tool called attract fluid, you can try playing with that to shape your smoke

or also you can create a force based on SDF to try to keep it in, but I guess attract fluid does more stuff to equalize pressure and density

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