[metalfox]

Dear foamers

I would like to create a boundary condition derived from cyclicFvPatchScalarField. The ultimate objective is to have inletOutlet functionality on a cyclic patch.

I've tried to overload updateCoeffs:

void cyclicInletOutlet::updateCoeffs()
{
    scalarField::operator =(-999.0);
}

but I've seen no effect.

It seems to me that it is necessary to overload properly:

void cyclicInletOutlet::updateInterfaceMatrix
(
    scalarField& result,
    const scalarField& psiInternal,
    const scalarField& coeffs,
    const direction cmpt,
    const Pstream::commsTypes
) const
{}

for the BC to work.
Although I know that the function arguments are related to the linear system, I don't know its actual meaning.
I presume that "result" is related with the independent term of the linear system, coeffs are the fv coefficents, "psi" may also refer to the unkwowns, etc.

I would like to implement a very simple inletOutlet BC, namely:

    ".*"
    {
        type            inletOutlet;
        value           0;
        inletValue      uniform 0;
    }

I believe this can be done directly in updateInterfaceMatrix.

Can somebody provide an example of updateInterfaceMatrix overriding?

Thanks so much

[karlli]

Metalfox,
Did you find a solution to your problem with the cyclic boundary condition? I am also trying to modify a cyclic BC, so it would be nice to see examples of a successful attempt. Hope you are able to share it!

Best regards,
Karl

[metalfox]

Did you find a solution to your problem with the cyclic boundary condition?

No. I'm sorry. I ended up abandoning this idea.

If I revisit it (and succeed), I'll post my approach.

Alberto