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MRF and topoSet problem- Rotating volume doesn't rotate

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Old   March 5, 2015, 12:29
Question MRF and topoSet problem- Rotating volume doesn't rotate
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Andreas V.
Join Date: Jul 2014
Posts: 13
Rep Power: 2
andreas0209@hotmail.com is on a distinguished road
Hi Foamer

this problem drives me crazy. I have a question regarding MRF implementation in a simpleFoam case. I try to simulate the effect of different rotation speeds on (particle laden) airflows flows. The computational domain is a vertical tunnel with a roating geometry (here a Rotor called Dynamic) inside (see picture). I guess the best approach for these problems is the MRF approach (?).

What I did. I've implemented MRF in snappyHexMesh Dict
Code:
geometry
{
    Dynamic.stl
    {
        type triSurfaceMesh;
        name Dynamic;
    }

    refinementCylinder
    {
        type searchableCylinder;
        point1 (1.5 0 0);//(1 0 0);
        point2 (0.6 0 0);//(0.72 0 0);
    radius 1.27;
    }
.
.
.

refinementSurfaces     
{ 
       Dynamic                {level (5 6); patchInfo {type wall;}} 
        refinementCylinder         
      {
       level (2 2); patchInfo {type patch;}    
       faceZone MRF;           
       cellZone MRF;           
       cellZoneInside inside;        
       }
After running snappyHexMesh, everything looks ok. The next step is then the comand topoSet.

Code:
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      topoSetDict;
}
----------------------------
actions
(
    {
        name    refinementCylinder; //MRF;
        type    cellZoneSet;
        action  new;
        source  zoneToCell;
        sourceInfo
        {
            name MRF;
        }
    }
);
If I open the case in paraView and activate "include sets", I am able to see that the MRF is perfectly around my geometry. The solving process seems to be ok, but I have the feeling that the rotating area is not rotating.

I've found many information about AMI, createBaffle etc., but I am not able to implement this in my case.
I would be more thatn happy if someone could help, because I am really desperate. I've attached all files for a better understanding.

Thanks in advance.

Andreas
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