BC's for non-matching faces

fportela · July 17, 2013, 13:17

Hello all,

I am trying to run a case where I need to use periodic boundary conditions (inlet/outlet) but unfortunately the mesh is not the same on both patches, i.e., the geometry is the same, but one patch has fewer faces than the other.

Is there any way to achieve this? I thought about using cyclicAMI but haven't managed to get it working...

Cheers,
Felipe

yzf1215 · July 20, 2013, 08:18

I suppose cyclic boundaries in OpenFOAM needs same amount of nodes and you shoud set the tolerance for matching the corresponding nodes.

Mojtaba.a · July 21, 2013, 20:29

It would be easy to make matching faces in GAMBIT or ICEM, why not trying these instead?

fportela · July 22, 2013, 04:12

Hey,

Thanks for the replies.

Indeed, cyclic conditions require the same amount of nodes/faces and the meshes should not be very different on both patches, so this will not work for me.

Regarding GAMBIT or ICEM, not only don't I have a license for those, but I have no experience with them... The geometry I am trying to mesh involves sharp corners and I have already had trouble getting a proper mesh in Gmsh.

Maybe I can rephrase the question: is it possible to map two patches to each other, so that the solution is interpolated from one to the other?

July 17, 2013, 13:17	BC's for non-matching faces	#1
fportela Member Felipe Alves Portela Join Date: Dec 2012 Location: FR Posts: 70 Rep Power: 13	Hello all, I am trying to run a case where I need to use periodic boundary conditions (inlet/outlet) but unfortunately the mesh is not the same on both patches, i.e., the geometry is the same, but one patch has fewer faces than the other. Is there any way to achieve this? I thought about using cyclicAMI but haven't managed to get it working... Cheers, Felipe

July 20, 2013, 08:18		#2
yzf1215 Member Zifei Yin Join Date: Sep 2012 Location: Shanghai & Ames Posts: 33 Rep Power: 13	I suppose cyclic boundaries in OpenFOAM needs same amount of nodes and you shoud set the tolerance for matching the corresponding nodes. fportela likes this.

July 21, 2013, 20:29		#3
Mojtaba.a Senior Member Mojtaba Amiraslanpour Join Date: Jun 2011 Location: Tampa, US Posts: 308 Rep Power: 15	It would be easy to make matching faces in GAMBIT or ICEM, why not trying these instead? fportela likes this. __________________ Learn OpenFOAM in Persian SFO (StarCCM+ FLUENT OpenFOAM) Project Team Member Complex Heat & Flow Simulation Research Group If you can't explain it simply, you don't understand it well enough. "Richard Feynman"

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July 22, 2013, 04:12		#4
fportela Member Felipe Alves Portela Join Date: Dec 2012 Location: FR Posts: 70 Rep Power: 13	Hey, Thanks for the replies. Indeed, cyclic conditions require the same amount of nodes/faces and the meshes should not be very different on both patches, so this will not work for me. Regarding GAMBIT or ICEM, not only don't I have a license for those, but I have no experience with them... The geometry I am trying to mesh involves sharp corners and I have already had trouble getting a proper mesh in Gmsh. Maybe I can rephrase the question: is it possible to map two patches to each other, so that the solution is interpolated from one to the other?