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marcus85 May 13, 2013 07:09

Pressure boundary conditions
 
Hello dear Foamers,

I'm new in CFD-Modelling with OpenFOAM, that's why it can be, that my questions are very easy for a skilled operator, but for me they are existential...

Can somebody explain me how thick my Layers should be for lowRE or HighRE.
I use the kOmegaSST Modell and the wall_function is the kQRWallfunction. I hope this helps. My Geometry are like some Tubes.

What i also want to ask is the Problem with my boundary Conditions for a Pressure setting.
I also have to say, that my geometry is very complex.

This are my Conditions for p:
dimensions [ 1 -1 -2 0 0 0 0 ];

internalField uniform 96710;

boundaryField
{
inlet
{
type fixedValue;
value uniform 97710;
}
outlet
{
type fixedValue;
value uniform 96710;
}
sym
{
type symmetryPlane;
}
valve
{
type zeroGradient;
}
wall
{
type zeroGradient;
}
}

for U i take the following:
dimensions [ 0 1 -1 0 0 0 0 ];

internalField uniform ( 0 0 0 );

boundaryField
{
inlet
{
type fixedValue;
value uniform (0 0 0);
}
outlet
{
type inletOutlet;
value uniform ( 0 0 0 );
inletValue uniform ( 0 0 0 );
}
sym
{
type symmetryPlane;
}
valve
{
type fixedValue;
value uniform ( 0 0 0 );
}
wall
{
type fixedValue;
value uniform ( 0 0 0 );
}
}

If i make use of the Condition for a Mass Flow the Solver works fine.

Many thx for your regress


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