smoke through an exhaust duct

#1

Hello,
in a project we need some steam for an exhaust duct.
So i never did something with fluids before…well…
it worked well with test scenes, but then i tried it with a basemesh of the exhaust duct.
So the smoke collides with the inner field and exhausts trough the little slots around them…
the problem is, that the smoke doesn’t go through it…i tried it with all kind of fields(air, drag etc.) up to some really high values.

i searched all over the web for some accuarcy values for the emitter…or some tutorials but couldn’t find anything…
has anyone a tip for a solution?

#2

have you tried just emitting out of an emitter that is shaped like the hole you are looking for? why even have collisions in that particular sim when you can use the actual fluid boundary and a properly shaped emitter? have you tried enabling display collision objects on the colliders? the collision offset may be closing up that hole. is the scale realistic? are the fluid grid boxes small enough? etc etc.

#3

Hey thanks for the answer!
I’m not sure what u mean with a emitter shaped like the hole. I need a pot with boiling water. the steam goes up and then i need to show 3 steps of the exhaust strenght. Maybe my picture wasn’t really understandable. :slight_smile: heres a new one…when i increase the slots it goes throught but i need them as tight as they are :confused:

If i shouldn’t use collide in that sim, what else should i use? Are there any fields what act as same as a geometry that collides with the smoke?
“tried enabling display collision objects” i can’t find that function in maya, google either. maybe it’s a new feature? we only have maya2012.
the fluid boundrybox is 20x20x20.

#4

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