[mattia]

Hi everyone!

I hope I chose the right section to post to.

I was wondering where I could find some information on the various dictionaries used by OpenFOAM. I feel that the documentation is somewhat lacking in this sense: when I need to use something that is not covered in the user guide, where can I find information about it? I know there are the tutorials too, but the various utilites are only used and never explained or commented upon.

More precisely, I am currently trying to solve a multiphase moving mesh case similar to the one shown in the interDyMFoam/DTCHull tutorial, but I am finding it difficult to proper set up the dictionary since I don't know where to find some kind of list with all the possible entries for the dynamicMeshDict and their meaning. Also the wiki page (http://openfoamwiki.net/index.php/Ma...m#Dynamic_Mesh) was not helpful, since it is too concise.

Can you please point me to some references where the less basic OpenFOAM utilities are explained?

Thanks in advance

[vitokad]

Hi Mattia,

if I understand what you are searching, in the installation directory of OpenFOAM there are all dictionaries with all commands that you can use. If you do a search in the directory, for example "controlDict", you'll find a file called "controlDict" with all the commands that you can use. Copy it in your simulation's directory and modify it

[mattia]

Hello Vito,

thanks a lot for the reply!
I am not sure I understand what you mean though. If I search for "dynamicMeshDict" in my OpenFOAM installation folder, this is what I get:

mattia@replicant:~$ of230
mattia@replicant:~$ cd $WM_PROJECT_DIR
mattia@replicant:OpenFOAM-2.3.0$ pwd
/home/mattia/OpenFOAM/OpenFOAM-2.3.0
mattia@replicant:OpenFOAM-2.3.0$ find . -name "dynamicMeshDict"
./tutorials/combustion/PDRFoam/flamePropagationWithObstacles/constant/dynamicMeshDict
./tutorials/multiphase/interFoam/laminar/damBreak/constant/dynamicMeshDict
./tutorials/multiphase/LTSInterFoam/DTCHull/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/mixerVesselAMI/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/sloshingTank3D/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/sloshingTank3D6DoF/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/testTubeMixer/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/sloshingTank2D3DoF/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/damBreakWithObstacle/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/sloshingTank2D/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/sloshingTank3D3DoF/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/floatingObject/constant/dynamicMeshDict
./tutorials/multiphase/interDyMFoam/ras/DTCHull/constant/dynamicMeshDict
./tutorials/multiphase/compressibleInterDyMFoam/ras/sloshingTank2D/constant/dynamicMeshDict
./tutorials/multiphase/interPhaseChangeDyMFoam/propeller/constant/dynamicMeshDict
./tutorials/multiphase/interMixingFoam/laminar/damBreak/constant/dynamicMeshDict
./tutorials/mesh/moveDynamicMesh/SnakeRiverCanyon/constant/dynamicMeshDict
./tutorials/mesh/foamyHexMesh/mixerVessel/constant/dynamicMeshDict
./tutorials/incompressible/pimpleDyMFoam/propeller/constant/dynamicMeshDict
./tutorials/incompressible/pimpleDyMFoam/mixerVesselAMI2D/constant/dynamicMeshDict
./tutorials/incompressible/pimpleDyMFoam/wingMotion/wingMotion2D_pimpleDyMFoam/constant/dynamicMeshDict
./tutorials/incompressible/pimpleDyMFoam/oscillatingInletACMI2D/constant/dynamicMeshDict
./tutorials/incompressible/pimpleDyMFoam/movingCone/constant/dynamicMeshDict
./tutorials/compressible/rhoPimpleDyMFoam/annularThermalMixer/constant/dynamicMeshDict
./src/dynamicFvMesh/dynamicRefineFvMesh/dynamicMeshDict
mattia@replicant:OpenFOAM-2.3.0$

The only file I thought might be what you were referring to is the last one, but I'm afraid it does not contain what I was looking for:

mattia@replicant:dynamicRefineFvMesh$ cat dynamicMeshDict 
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.0.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

//dynamicFvMeshLib   "libtopoChangerFvMesh.so";
dynamicFvMesh      dynamicRefineFvMesh;
//staticFvMesh;

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

    rpm             10;

    slider
    {
        inside      insideSlider;
        outside     outsideSlider;
    }
}

// Refinement
dynamicRefineFvMeshCoeffs
{
    // Refine every refineInterval timesteps
    refineInterval 3;

    // Maximum refinement level (starts from 0)
    maxRefinement 2;

    // Maximum cell limit (approximate)
    maxCells 1000000;

    // volScalarField to base refinement on
    field gamma;

    // Which cells to un/refine: based on point values (simple averaging).
    // - refine pointCells of point value inbetween minLevel..maxLevel
    // - unrefine pointCells that are within nBufferLayers of points marked
    //   for refinement.
    minLevel 0.01;
    maxLevel 0.99;
    nBufferLayers 1;

    // Newly introduced patch points optionally get projected onto a surface
    //projectSurfaces ("fixedWalls4.stl");
    //projectPatches (fixedWalls);
    // Maximum project distance
    //projectDistance 1;

    // Fluxes to adapt. For newly created faces or split faces the flux
    // gets estimated from an interpolated volVectorField ('velocity')
    // First is name of the flux to adapt, second is velocity that will
    // be interpolated and inner-producted with the face area vector.
    correctFluxes ((phi U));
}

// ************************************************************************* //
mattia@replicant:dynamicRefineFvMesh$

Did I misunderstand your suggestion?

Thanks again for your help

[vitokad]

You understand right, but it is strange there is not a general dynamicMeshDict file that contains the possible commands..I'll try to look on my computer and I'lltell you

[mattia]

Ok, I'll wait for your reply! Thanks a lot