Smoke through an exhaust duct?

[Anonymous]

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. (attachment)
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?

[Anonymous]

Hey,

From what you say it sounds like the resolution of your simulation domain isn't high enough.

You have to remember that Maya Fluids does NOT use a variational framework (see Bridson's famous work on this here: http://www.cs.ubc.ca/nest/imager/tr/2007/Batty_VariationalFluids/). Instead, solids are rasterised on the simulation grid with a voxel either being solid or fluid. This means that whatever the fluid needs to pass through has to be at least one voxel in diameter.

If you are unable to work with a simulation domain as complex as your high-res mesh requires, try using a proxy object for the fluid-solid interaction.

Hope this helps!

Regards,

Stephan