How to costrain fire and smoke inside a mesh?

Fluid Dynamics for CINEMA 4D
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Duca
Posts: 28
Joined: 18 Apr 2014, 14:08

How to costrain fire and smoke inside a mesh?

Post by Duca » 10 Jan 2018, 10:40

Hallo everybody,
I am trying to constrain smoke (and fire ) to follow the mesh shape before coming out from it:
Constrain TFD.JPG
Constrain TFD.JPG (143.81 KiB) Viewed 639 times
.
Note that I set Collision Object in the Emitter Tag...

Thanks for a reply.

chris001
Posts: 73
Joined: 05 Nov 2010, 13:52
Location: nrw, germany
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Re: How to costrain fire and smoke inside a mesh?

Post by chris001 » 10 Jan 2018, 19:22

Hello,
why is the "Collision Object" enabled on the emitter object?
You have to put another TFD tag on the collision-object and enable it there, but not on the emitter...

Also, i guess the fluids will then collide with the outside of your collision object. Your collision object needs probably a thickness. But i can't really see that on the screenshot...
pixellusion vfx

Duca
Posts: 28
Joined: 18 Apr 2014, 14:08

Re: How to costrain fire and smoke inside a mesh?

Post by Duca » 11 Jan 2018, 08:57

Hi chris,
I did a next step but it doesen't work...:
Constrain TFD 03.JPG
Constrain TFD 03.JPG (177.06 KiB) Viewed 632 times
How can you see, the Arc mesh has thickness and the second TDF Tag added on the collision-object is enabled.
I attach this very basic simple scene so you can check it personally.
Curved_fire_smokes_TurbFD_01.c4d
(608.5 KiB) Downloaded 29 times
Thanks for a reply!

Duca
Posts: 28
Joined: 18 Apr 2014, 14:08

Re: How to costrain fire and smoke inside a mesh?

Post by Duca » 11 Jan 2018, 09:37

Normals are also in the right way:
Constrain TFD 04.JPG
Constrain TFD 04.JPG (194.56 KiB) Viewed 631 times

chris001
Posts: 73
Joined: 05 Nov 2010, 13:52
Location: nrw, germany
Contact:

Re: How to costrain fire and smoke inside a mesh?

Post by chris001 » 11 Jan 2018, 11:19

Almost... ;) Your Collision-Object doesn't have an actual thickness. You extruded it without having "Create Caps" enabled in the extrude tool. So your object doesnt have an inner wall...
Also you will have to make the object quite thick, because if the wall is too thin, it's thinner than the voxel size and will leak..

Try this:
Attachments
Curved_fire_smokes_TurbFD_02.c4d
(858.38 KiB) Downloaded 46 times
pixellusion vfx

Duca
Posts: 28
Joined: 18 Apr 2014, 14:08

Re: How to costrain fire and smoke inside a mesh?

Post by Duca » 11 Jan 2018, 16:23

Hi chris,
great!
It works!
MANY THANKS!

chris001
Posts: 73
Joined: 05 Nov 2010, 13:52
Location: nrw, germany
Contact:

Re: How to costrain fire and smoke inside a mesh?

Post by chris001 » 11 Jan 2018, 16:29

you're welcome :)
pixellusion vfx

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