[_Stefan_]

Hi,

I want to implement an new Order to Calculate the Viscosity nu.

Ostwald Waele Potential Function

tau = k * strain rate ^n

k and n are model Parameter and depend on rho
k=a*rho+b
n=c*rho+d

I got a, b, c, d from some experiments.

The equation for the rotation rheometer:

nu = tau / strain rate

What I have done:

//read strain rate
    tmp<volScalarField> sr(strainRate());

//Parameter 
    dimensionedScalar ka_("ka_",dimensionSet(0,2,-1,0,0,0,0), 0.1202); 
    dimensionedScalar kb_("kb_",dimensionSet(1,-1,-1,0,0,0,0), 24.912); 
 
    dimensionedScalar na_("na_",dimensionSet(-1,3,0,0,0,0,0), 0.0005); 
    dimensionedScalar nb_("nb_",dimensionSet(0,0,0,0,0,0,0), 0.2246);

//read ScalarFeldes rho_ps 
    const tmp <volScalarField> & rhoCalc = U_.mesh().lookupObject<volScalarField>("rho_ps");

//calculation n and k 
    volScalarField K = ka_ * rhoCalc + kb_; 
    volScalarField N = na_ * rhoCalc + nb_;

//Calculation nu
    tmp <volScalarField> nu = K * Foam::pow(max(tone * sr(),VSMALL),N-1.);

tone is only a dimensioned scalar with 1[s] to make sr() dimensionless.

My Problem is that it did not compile.
If I change N in the pow function to an dimensioned scalar it works fine.
Is it possible that, Foam:ow (volScalarField, volScalarField) does not work?

Here the error massage:

/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/GeometricScalarField.C:189: error: no matching function for call to ‘Foam::dimensioned<double>::dimensioned(const char [2], double, const Foam::dimensionSet&)’
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.C:107: note: candidates are: Foam::dimensioned<Type>::dimensioned(const Foam::word&, const Foam::dimensionSet&, Foam::Istream&) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.C:94: note: Foam::dimensioned<Type>::dimensioned(const Foam::word&, Foam::Istream&) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.C:82: note: Foam::dimensioned<Type>::dimensioned(Foam::Istream &) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.H:95: note: Foam::dimensioned<Type>::dimensioned(const Type&) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.C:69: note: Foam::dimensioned<Type>::dimensioned(const Foam::word&, const Foam::dimensioned<Type>&) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedType.C:55: note: Foam::dimensioned<Type>::dimensioned(const Foam::word&, const Foam::dimensionSet&, Type) [with Type = double]
/SimSoftware/OpenFOAM/OpenFOAM-1.5/src/OpenFOAM/lnInclude/dimensionedScalarFwd.H:42: note: Foam::dimensioned<double>::dimensioned(const Foam::dimensioned<double>&)