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Old   January 14, 2017, 06:14
Default FSI motion error
  #1
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Gaurav Singh
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Grids of my 3D geometry are leaving some gap at interface between solid and fluid.[see- attachment]
What could be the reasons for it?

solver- icoFSIElasticNonLinULSolidFoam

motion U
Code:
FoamFile
{
    version     2.0;
    format      ascii;
    class       tetPointVectorField;
    object      motionU;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{

      plate
      {
  		 type fixedValue;
   		 value uniform (0 0 0);
       }

       topWall
       {
   		type slip;
        	value           uniform (0 0 0);
	}

	bottomWall
	{
  		 type fixedValue;
   		 value uniform (0 0 0);
	}

	outlet
	{
  		 type fixedValue;
   		 value uniform (0 0 0);
	}

	
	frontAndBackPlanes
	{
   		type slip;
        	value           uniform (0 0 0);
	}


	inlet
	{
   		 type fixedValue;
   		 value uniform (0 0 0);
	}
}

U
Code:
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    plate
    {
        type            movingWallVelocity;
        value           uniform (0 0 0);
    }
    topWall
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    bottomWall
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    outlet
    {
        type            zeroGradient;
    }
    inlet
    {
        type            transitionalParabolicVelocity;
        maxValue        0.056;
        n               ( 1 0 0 );
        y               ( 0 1 0 );
        transitionPeriod 1.17;
        boundBoxMin     ( 0 0 -0.024 );
        boundBoxMax     ( 0 0.0275 0.024 );
        value           uniform (0 0 0);
    }
    frontAndBackPlanes
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
}
Please help
Thanks
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File Type: png Screenshot from 2017-01-14 15-37-08.png (28.5 KB, 18 views)
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Old   January 22, 2017, 12:51
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khedar
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Is your mesh a single mesh or you are using mergeMesh to merge two meshes.

I have had similar problem in OF2.3.1 which i solved by shifting to OF4.x.
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Old   January 23, 2017, 03:46
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Gaurav Singh
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using single mesh.

I am running foam extend 3.2. Other versions dont have this solver

How to use mergeMesh?
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