[lg88]

hello everyone
I want to solve a pressure Poisson equation with boundary conditions of value calculated on the last step. the P input file I set is as follow:


dimensions [0 2 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
IN
{
type zeroGradient;
}

OUT
{
type zeroGradient;
}

SIDE
{
type calculated;
}

}

But I get the following error:

FOAM FATAL ERROR:

gradientInternalCoeffs cannot be called for a calculatedFvPatchField on patch outflow of field p in file "/home/lg88/mfmFoam/0/p"
You are probably trying to solve for a field with a default boundary condition.

From function calculatedFvPatchField<Type>::gradientInternalCoef fs() const in file /opt/openfoam210/src/finiteVolume/lnInclude/calculatedFvPatchField.C at line 187.

Does anybody know how to use this boundary condition? where can i find similar tutorials?

Thank you very much!

lg88