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-   -   rotational and noOrdering and translational (https://www.cfd-online.com/Forums/openfoam-pre-processing/121224-rotational-noordering-translational.html)

gdi12 July 24, 2013 04:02

rotational and noOrdering and translational
 
kan someone tell me what is the difference among the rotational and noOrdering and translational...In my case, the three type all work .. I am interested in the
difference..
thanks advance!

WINDKRAFTANLAGE
{
type wall;
nFaces 5218;
startFace 513706;
}
AMI01
{
type cyclicAMI;
nFaces 7446;
startFace 518924;
neighbourPatch AMI02;
transform noOrdering;

}
OUTLET
{
type patch;
nFaces 486;
startFace 526370;
}
AMI02
{
type cyclicAMI;
nFaces 1494;
startFace 526856;
neighbourPatch AMI01;
transform noOrdering;

}
INLET
{
type patch;
nFaces 486;
startFace 528350;
}
TOP
{
type cyclicAMI;
nFaces 1116;
startFace 528836;
neighbourPatch DOWN;
matchTolerance 0.0001;
transform translational;
separationVector (0 0 -1.75E4);
}
DOWN
{
type cyclicAMI;
nFaces 1116;
startFace 529952;
neighbourPatch TOP;
matchTolerance 0.0001;
transform translational;
separationVector (0 0 1.75E4);
}
FRONT
{
type cyclicAMI;
nFaces 1674;
startFace 531068;
neighbourPatch BACK;
matchTolerance 0.0001;
transform translational;
separationVector (0 2E4 0);
}
BACK
{
type cyclicAMI;
nFaces 1674;
startFace 532742;
neighbourPatch FRONT;
matchTolerance 0.0001;
transform translational;
separationVector (0 -2E4 0);
}
)

HenningW June 16, 2015 04:34

Hi there,

I had a similar thing happening to me. I mistakenly used "rotational" instead of "noOrdering". The simulation ran but the results were not convincing me. I think all 3 (maybe even all 5) option may run when you are lucky with your mesh. However, when I refined it, it stopped working before the first time step with "rotational". So I assume it is a coincident.
I do not know your problem, but since it says "Windkraftanlage" I assume you were using a sliding mesh to simulate the rotation of your rotor blades and might want to stick to "noOrdering". However, I just posted something here, maybe it helps you out: http://www.cfd-online.com/Forums/ope...tml#post550518


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