[John.C]

hello,everyone:
I am a beginner for openfoam.Now I am studying circular cylinder oscillating in fluid at rest using pimpleDymFoam. And I want to ask something about the moving mesh problems.I don't know how to set the dynamicMeshDic file.

FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

// dynamicFvMesh staticFvMesh;
dynamicFvMesh multiTopoBodyFvMesh;

multiTopoBodyFvMeshCoeffs
{
body
(
frontCyl
{
movingCells cyl1;
layerFaces
(
topLayerCyl1
botLayerCyl1
);

solidBodyMotionFunction linearOscillation;
linearOscillationCoeffs
{
amplitude (0 0.01 0);
period 4;
}

minThickness 0.0015;
maxThickness 0.004;

invertMask true;
}

/* backCyl
{
movingCells cyl2;
layerFaces
(
topLayerCyl2
botLayerCyl2
);

solidBodyMotionFunction linearOscillation;
linearOscillationCoeffs
{
amplitude (0 -0.025 0);
period 2;
}

minThickness 0.0015;
maxThickness 0.004;

invertMask true;
}*/
);
}

// ************************************************** *********************** //
This is the file I copied in the movingcylinders tutorial. And I want to simulate one cylinder oscillating in fluid at rest.How did I revise this file?
Thank you so much for your help!

[chujeh2020]

Originally Posted by John.C

hello,everyone:
I am a beginner for openfoam.Now I am studying circular cylinder oscillating in fluid at rest using pimpleDymFoam. And I want to ask something about the moving mesh problems.I don't know how to set the dynamicMeshDic file.

FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

// dynamicFvMesh staticFvMesh;
dynamicFvMesh multiTopoBodyFvMesh;

multiTopoBodyFvMeshCoeffs
{
body
(
frontCyl
{
movingCells cyl1;
layerFaces
(
topLayerCyl1
botLayerCyl1
);

solidBodyMotionFunction linearOscillation;
linearOscillationCoeffs
{
amplitude (0 0.01 0);
period 4;
}

minThickness 0.0015;
maxThickness 0.004;

invertMask true;
}

/* backCyl
{
movingCells cyl2;
layerFaces
(
topLayerCyl2
botLayerCyl2
);

solidBodyMotionFunction linearOscillation;
linearOscillationCoeffs
{
amplitude (0 -0.025 0);
period 2;
}

minThickness 0.0015;
maxThickness 0.004;

invertMask true;
}*/
);
}

// ************************************************** *********************** //
This is the file I copied in the movingcylinders tutorial. And I want to simulate one cylinder oscillating in fluid at rest.How did I revise this file?
Thank you so much for your help!

Dear John.C
Please refer to this thread
http://www.cfd-online.com/Forums/ope...amic-mesh.html

Thank you.

[HenningW]

Hi John,

I am using a cylindrical shaped part of my mesh around an airfoil that is oscillating with 100Hz between -+5° (sliding mesh).

Here is my file ... hence that I have two cylinders moving. However, the structure for a SolidBodyMotion should be more or less the same.

dynamicFvMesh multiSolidBodyMotionFvMesh;
multiSolidBodyMotionFvMeshCoeffs
{
    movingZoneLeft
    {
    solidBodyMotionFunction oscillatingRotatingMotion;
    oscillatingRotatingMotionCoeffs
    {
        amplitude (0 5 0);
        omega 628.32;
        origin (0 .4 -.4);
    }
    }
    movingZoneRight //The name I gave it
    {
    solidBodyMotionFunction oscillatingRotatingMotion;
    oscillatingRotatingMotionCoeffs
    {
        amplitude (0 5 0);
        omega 628.32;
        origin (0 .4 .4);
    }
    }
}

I hope this helps!