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Setting up case with a moving part between to static ones

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Old   January 6, 2012, 04:03
Default Setting up case with a moving part between to static ones
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Hello,
I was wondering if someone could help me out. I am trying to set up a transient 3D case using pimpleDyMFoam and GGIs, consisting of a rotating pump impeller connected to a static inlet duct and a static outlet spiral. I haven't seen a tutorial so far which explains how to hande two pairs of moving-static-interfaces, and don't know how to set them up in the dynamicMeshDict.
Also: is it correct, that the moving CellZone needs to be called movingCells? Or will the solver deduct this from the connected moving faces?
I am using OF-1.6-ext. Thanks in advance for any advice.

Last edited by Kaskade; January 6, 2012 at 08:28.
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Old   February 12, 2012, 14:03
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In dynamicMeshDict:

slider
{
moving ( FACE1a FACE2a );
static ( FACE1b FACE2b );
}

The names can of course be chosen freely.
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Old   February 13, 2012, 02:08
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Niels Nielsen
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Using multiple rotating parts you need to use something like this

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM Extend Project: Open Source CFD        |
|  \\    /   O peration     | Version:  1.6-ext                               |
|   \\  /    A nd           | Web:      www.extend-project.de                 |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dynamicFvMesh       turboFvMesh;

turboFvMeshCoeffs
{
    coordinateSystem
    {
        type            cylindrical;
        origin          (0 0 0);
        axis            (0 0 1);
        direction       (1 0 0);
    }

    rpm
    {
        cellRegion0  60;
        cellRegion1  -20;
    }

    slider
    {
    }
}

// ************************************************************************* //
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Old   February 13, 2012, 02:09
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Did not see you only had one rotating part,

Then yes using the mixerGgiFvMesh method the rotating cellZone has to be named movingCells.

Best
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Old   February 13, 2012, 09:32
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Thanks for answering.

I think in OpenFOAM 2.1 the name of the mesh-part that is supposed to move can be chosen freely.
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Old   March 31, 2012, 19:33
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Could you better help me to understand the turboFvMesh?
My case contains a co-axial rotor system, 2 rotors with 2 ggi's, inside a cylinder that represent the atmosphere.
1. Does it require a ggi? Or can it rotate meshes without the ggi? I see no slider info was input.
2. Is it a moving mesh? Viewing the meshes rotation is key for my case.
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Old   April 1, 2012, 01:13
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Could you maybe send a drawing of your setup?
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