sliding meshes

betakv · August 12, 2009, 09:23

Hi, I've problem with a geometry which is simply described in attached file. The rotor1 has right-hand rotation and the rotor2 has left-hand rotation.
I've used the MRFSimpleFoam for solution. The results are good and I want try a simulation with sliding meshes. Is there any possibility make this simulation in OpenFOAM? I will try a solver, which is described in mixerGgi, but I don't know how to describe this geometry into dynamicMeshDict.

Can you give me an advice?

Thank's a lot.

Vojta

henrik · August 12, 2009, 13:34

Dear Vojta,

The geometry is not described in dynamicMeshDict, but is imported with the mesh which is created by blockMesh in this particular tutorial. The mechanics (point motion, attach, detach) is handled in dynamic mesh motion classes:

$FOAM_SRC/topoChangerFvMesh/mixerFvMesh/mixerFvMesh.C

OR

$FOAM_SRC/dynamicFvMesh/mixerGgiFvMesh/mixerGgiFvMesh.C

which read their controls from dynamicMeshDict.

To get your case off the ground, you need to do three things: a) find a way to create the initial mesh; b) Modify the dynamic mesh motion classes to select and rotate two regions; c) Modify the dynamic mesh motion classes to create and operate two interfaces.

A word of warning, the sliding interfaces don't like corners, but GGI will be okay.

Henrik

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August 12, 2009, 13:34		#2
henrik Senior Member Henrik Rusche Join Date: Mar 2009 Location: Wernigerode, Sachsen-Anhalt, Germany Posts: 281 Rep Power: 18	Dear Vojta, The geometry is not described in dynamicMeshDict, but is imported with the mesh which is created by blockMesh in this particular tutorial. The mechanics (point motion, attach, detach) is handled in dynamic mesh motion classes: $FOAM_SRC/topoChangerFvMesh/mixerFvMesh/mixerFvMesh.C OR $FOAM_SRC/dynamicFvMesh/mixerGgiFvMesh/mixerGgiFvMesh.C which read their controls from dynamicMeshDict. To get your case off the ground, you need to do three things: a) find a way to create the initial mesh; b) Modify the dynamic mesh motion classes to select and rotate two regions; c) Modify the dynamic mesh motion classes to create and operate two interfaces. A word of warning, the sliding interfaces don't like corners, but GGI will be okay. Henrik