[maksen]

Hi All,

Is there anything similiar to the "interiour" boundary condition of fluent in Openfoam?

I am using snappyhexmesh for the mesh generation and added an extra face to the original geometry for better controlling the mesh generation process. However when setting up the boundary file and subsequently all the other files for specifying the boundary conditions i have to deal with that "extra" face. I cannot set any boundary condition on it because it was only used for the mesh generation.

Up until now I couldn't find any bc for that in OF, so maybe some of you might know some kind of workaround...

cheers for your help,
markus

[wyldckat]

Greetings maksen,

I've searched for that very same question and found this about a year ago, but never got around to test it

Additionally, in openfoamwiki.net, you have this old wiki page: "Howto importing fluent mesh with internal walls". Nonetheless, it's another thing I didn't get around to test either.

You could try groovyBC, which allows some special cases of boundary conditions, but it's just another one I've not tested yet.

Also, I know I read somewhere on this forum that it wasn't possible to define interior patches, but I might be outdated.

Best regards,
Bruno Santos

[maksen]

Hi Bruno,

thanks for those hints.... i'll give them a go asap and let you know....

cheers
Markus

[jason.ryon]

I am also trying to get "interior" patches from a Fluent mesh in OF. I looked at this howto about internal walls, and step 4 is:

Add for the internal wall a pair of empty patches (with zero length) in the <constant><polyMesh> section of your case:
wall_A
{
type wall;
startFace ;
nFaces 0;
}

wall_B
{
type wall;
startFace ;
nFaces 0;
}

What file do I add this to (i.e. polyMesh/boundary??) and what values do I use for startFace?

[maksen]

Hi Jason,

yes, this goes in to the boundary file.. the startface number should be consistent with the original mesh.. i.e. the face number of the first face in the patch wall....

anyhow... i'm still not able to switch wall to interiour..tried a lot... no success so far... thinking of writing an interiour boundary condition myself if i find the time..

good luck!
markus