[GerhardHolzinger]

Hi,

The UserManual says, that the partialSlip is a mixture of zeroGradient and slip BC. The following listing is the evaluate() function of partialSlipFvPatchField.

If the value of valueFraction_ is zero, then the BC behaves like a slip BC. If the value of valueFraction is one, then - as far as I understand the code - a zero value is prescribed.

Did I get something wrong? To me it seems partialSlip is a mix of slip and zeroValue rather than zeroGradient.

template<class Type>
void Foam::partialSlipFvPatchField<Type>::evaluate
(
    const Pstream::commsTypes
)
{
    if (!this->updated())
    {
        this->updateCoeffs();
    }

    tmp<vectorField> nHat = this->patch().nf();

    Field<Type>::operator=
    (
        (1.0 - valueFraction_)
       *transform(I - sqr(nHat), this->patchInternalField())
    );

    transformFvPatchField<Type>::evaluate();
}