Boundary condition for internal "wall"

Lucie · February 29, 2016, 05:11

Hi,

I am a new user of Openfoam and I tried to realize a chtMultiRegionSimpleFoam case. It is a solid encircled by air with 4 regions:
-Solid
- Air1, Air2 and Air3

Between Air1/Air2 and Air2/Air3 I don't know what is the boundary condition for the velocity to illustrate the internal condition (Air1_to_Air2 and Air2_to_Air3).

Someone can help me ?

Thank you very much,
Lucie

jmdf · February 29, 2016, 05:24

Hi,

as far as I know it is problematic to work with fluid-to-fluid interfaces with chtMultiRegionFoam.
One solution could be to create only one fluid region. If you can joint all the Air regions, you won't have that problem.

Lucie · February 29, 2016, 07:19

Hi,

Thanks. I tried and it works with only one fluid region !

February 29, 2016, 05:11	Boundary condition for internal "wall"	#1
Lucie New Member Lucie Join Date: Feb 2016 Posts: 6 Rep Power: 10	Hi, I am a new user of Openfoam and I tried to realize a chtMultiRegionSimpleFoam case. It is a solid encircled by air with 4 regions: -Solid - Air1, Air2 and Air3 Between Air1/Air2 and Air2/Air3 I don't know what is the boundary condition for the velocity to illustrate the internal condition (Air1_to_Air2 and Air2_to_Air3). Someone can help me ? Thank you very much, Lucie

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February 29, 2016, 05:24		#2
jmdf Member João Ferreira Join Date: Nov 2014 Location: Braga, Portugal Posts: 53 Rep Power: 11	Hi, as far as I know it is problematic to work with fluid-to-fluid interfaces with chtMultiRegionFoam. One solution could be to create only one fluid region. If you can joint all the Air regions, you won't have that problem.

February 29, 2016, 07:19		#3
Lucie New Member Lucie Join Date: Feb 2016 Posts: 6 Rep Power: 10	Hi, Thanks. I tried and it works with only one fluid region !