Internal fan
 

I'm trying to model an internal fan, but I can't figure out how to associate the pair of cyclic patches generated by createBaffles dict to a geometry (disk surface) read in by snappyHexMesh.

None of the tutorials I've looked at cover that.

Can anybody point me in the right direction?

Hello Alex, I am having the same problem as well. Have you found the answer so far?

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type the command createBaffles in terminal opened in case directory

What is the setting in createBafflesDict?

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Lets say, you have an internal face in domain for fan, baffles dict will convert it into a boundary-like face, and split it into 2 faces (..half_0 & half_1).

So, the createBafflesDict would look like this:-

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.2.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object createBafflesDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

internalFacesOnly true;


baffles
{


cyclicFaces1
{
type faceZone;
zoneName Fan;
patches
{
master
{
name Fan_half0;
type cyclic;
featureCos 0.9;
neighbourPatch Fan_half1;
}
slave
{
name Fan_half1;
type cyclic;
featureCos 0.9;
neighbourPatch jetFan1_half0;
}
}
}

And the boundary file:-

Fan_half0
{
type cyclic;
inGroups 2
(
cyclic cyclicFaces1
);

nFaces 341;
startFace 1633212;
matchTolerance 0.0001;
transform unknown;
neighbourPatch Fan_half1;
}


Fan_half1
{
type cyclic;
inGroups 2
( cyclic cyclicFaces1);

nFaces 341;
startFace 1633553;
matchTolerance 0.0001;
transform unknown;
neighbourPatch jetFan1_half0;
}

Thanks for detail reply vs1. What are about my master and slave are two separate stl files? They have different shape and position. How to setup?

Thank you very much